(5884,2265,'Gregory Ferenstein','','','','2009-04-28 12:00:00','2009-04-28 12:00:00','Secrets of Mental Math is in a league of its own. Its clear, succinct, and well paced. If you\'re familiar with the \"For Dummies\" series (like I am, I admit!), the book reads at about the same level.<br><br>Its worth purchasing because the shortcuts aren\'t anywhere else on the Internet. (I think the author actually discovered some of the mathematical shortcuts, himself).<br><br>One word of caution: make sure you feel comfortable with each technique before moving on. I didn\'t do this the first run through, and had to go back.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5885,2265,'Constinia Charbonnette','','','','2014-02-09 12:00:00','2014-02-09 12:00:00','I mentor young kids in my community, and a major aim of my outreach is to plant the seeds of passion about mathematics. In my experience with the next generation of Millennials, they want information quick and explained in an uncomplicated way.  While I remembered all of the tricks and short cuts I learned on how to do mental math, I found it difficulty to pass that knowledge on to my mentees.  This book really helped me a lot!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5886,2265,'ID','','','','2013-01-27 12:00:00','2013-01-27 12:00:00','As an adult most folks already figured out some short cuts in doing mental math. You still may learn a few things from this book..<br>I think where it really proves useful is when your kids read/learn it. You can expedite there math skills rather quickly with this book instead of them coming to the realization of these techniques later in life.<br><br>Great book for kids and perfectly good for adults that need a boost in their math skills.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5887,2265,'M. Miehls','','','','2010-03-25 12:00:00','2010-03-25 12:00:00','This is a great book. It\'s filled with shortcuts that kids and adults alike can use. I expect my daughter to make use of some of the techniques when she takes the ACT this June. Because it speeds calculation it should save her some time. Now it\'s more like a game when we go shopping and I ask \"what is the sales tax\" or \"hey tell me 45x45...come on quick.\" She rises to the challenge. Good book. Shortcuts are there that everyone can use to some degree.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5888,2265,'Ulrich Semrau','','','','2010-02-11 12:00:00','2010-02-11 12:00:00','Great little book. Basic math should be taught this way in all schools. The way we teach now creates problems with math for the majority of people. The United States is 24th in math scores world wide. What is insanity, doing the same thing over and over the same way and expecting a different result? That is what our educational system does. This book gives us a fun and effective way to teach basic math so our kids continue on to the more complex and fun stuff.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5889,2265,'Zach Foreman','','','','2007-09-25 12:00:00','2007-09-25 12:00:00','I am a professional SAT/GRE teacher and tutor, achieving an 800 in the GRE math section. After telling many students that the secret to the math section is mental math and approximation, I decided to see what books were available. I saw that this one had good reviews and ever since then I have been bringing the book to all my classes and tutoring sessions. I recommend this book for those who never felt they got the hang of math as well as people who love it like I do. It is clearly written, very encouraging and has lots of drills.<br>I love this book and I think that it really will help people feel more confident when they take a test or just are trying to figure the tip.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5890,2265,'A Parent','','','','2023-06-29 12:00:00','2023-06-29 12:00:00','Other books has same content, except for the last chapters which are quite cool actually!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5891,2265,'Michael Twomey','','','','2013-05-25 12:00:00','2013-05-25 12:00:00','I am totally updating my initial review of \"Secrets of Mental Math\" because I am more than enough of a Man to admit when I am wrong! My initial review was fueled by frustration that should have been directed at the awful school system we suffer from (I LOVE America, I do NOT like out school system, grade school, jr. high, highschool--I really enjoyed and learned a lot in College:)<br><br>Anyway, I locked myself in a quiet room with \"Secrets of Mental Math\" a pen and paper and some hot, strong coffee and I FORCED myself to do all the examples and read until I did find the \"how to\" (initially they just show off and this pissed me off because it reminded me of the smart kids in the front row that answered every question easily and mislead the teachers into thinking we all understood how to do things when in fact most of us were almost \"drowning\" and stuggling just to pass the class and the teachers just wanted to teach to those bright students and left the rest of us in the dust--the authors totally show off yet they also teach )<br><br>So now after a few days of practice I am actually able to do some cool math magic, even in my head! I am a bit Math Dyslectic (not sure if this is a real learning issue, yet I know many people tend to \"switch numbers\" when they are under stress and I got many \"wrong number phone calls\" over the years from people trying to dial a 948 and instead they misdialed a 984 and so got the wrong number. I sometimes do this with addresses too and I know I had \"bad math teachers\" who actually used \"bad hypnosis\" to program me that \"you just aren\'t good at math, be glad you are so smart in most other subjects...\"<br><br>So I deprogrammed myself with Self Hypnosis, NLP, EFT, etc. and now I know to be really careful of my \"bad habit\" of \"switching numbers\" and also of using tiny corners of pages to do arithmatic and so I can barely even read my own handwriting (this comes from the \"you have to show your work or we think you are cheating\" from bad school systems because early on I learned to be good at math from my European born mother and I \"got in trouble\" with the schools for \"doing things my way\" and eventually they just confused me so much that I \"WAS bad at math\" and now I am actually quite good and improving all the time.<br><br>My apologies to the very good authors of \"Secrets of Mental Math\" and I am grateful for their very good book and glad I am stubborn enough and open minded enough to give things another try and so I can learn better and be more Limitless :)<br><br>Michael Twomey',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5892,2265,'Scott Henson','','','','2014-06-10 12:00:00','2014-06-10 12:00:00','Gave these out as end-of-the year rememberances to the 4th and 5th graders at an elementary school Math Pentathlon club. Next year, if I can find a sponsor, I plan to hand them out as the beginning of the year as de facto textbooks for that age. Used it over the year to teach how to do math in their heads to make them faster at the games. Usually took 10-15 minutes at beginning of club meeting to work on mental tricks, mostly from this book (or Khan Academy), and an hour and a quarter practicing the five games which are part of the Math Pentathlon competition.  In one school year with once per week after-school practice, my group wasn\'t able to get too deep into the weeds. But the instruction piece really helped their level of competitiveness on the games, especially learning to add and multiply (relatively) large numbers in their heads. The trick about multiplying by eleven alone will delight even a struggling math-o-phobe.<br><br>Some parts are well-written, some a little dense and repetitive. Getting good at these tricks really does require practice (along with already knowing one\'s multiplication tables). But if parents are putting time in at home to practice them with their kids, the payoff would happen pretty quick. Very useful techniques, once mastered.<br><br>Just reading this book won\'t make you better at math. But reading it and doing all the practice activities will. You\'ll get out of this book what you put into it.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5893,2265,'Harrison H. &amp; Margie Sheld','','','','2016-08-05 12:00:00','2016-08-05 12:00:00','I bought this book to supplement the Teaching Company’s lecture series by the same author. The book is 275 pages and is copyright 2006. I am about halfway through it and find the information very dense requiring much intensive review, of which there are an adequate number of helpful work sheets with complete computations. It is my impression that the methodology marketed as “tricks,” requires a trained retentive memory and is above the abilities of the average person. In this regard, the ubiquitous availability of computers is a significant disincentive to learning these different mathematical methods. Where possible practical applications are provided. However, unless these methods are used on regular basis, practicality must be qualified. To follow through, achieving the program’s objectives requires a definite study commitment. What I found most interesting were different and potentially better ways for dealing with number problems involving basic mathematical operations. As a supplement to the Teaching Company’s course of basically the same name, I found the book extremely helpful.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5894,2265,'M. Buckman','','','','2009-10-21 12:00:00','2009-10-21 12:00:00','I can\'t really add anything that the other good reviews haven\'t already mentioned, so I\'ll just say that the Kindle edition of the book is great. I own the printed edition and wanted the Kindle edition to make accessing this material more convenient. Since this book uses many tables, and I\'ve seen some Kindle books that do not format tables correctly, I was hesitant to try this book since the sample did not include any of this material for me to check. However, I was pleased to see that all of the tables were formatted exactly as they are in the book. Since the tables appear to be entered as pictures rather than text, you cannot resize them, but that\'s not too big of a deal. The only complaint I have, and it is a minor one, is that the answers in the back are linked to the tables to which they correspond, but the tables are not linked to the answers. Otherwise, the Kindle edition is perfect.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5895,2265,'Aaron Ziegler','','','','2016-06-01 12:00:00','2016-06-01 12:00:00','I\'m about half way through the book and can say I\'ve definitely picked up some useful tricks. Be warned, this isn\'t a passive read where everything will suddenly click and you will be a math whiz. I recommend taking the chapters slowly and making your own exercises to really drive the concepts home. The first few chapters are cumulative, but eventually you are able to jump around and learn what tricks sound most appealing to you. My personal favorite is the ability to memorize strings of numbers. Has a ton of practical use in everyday life. I love being good at arithmetic and this book gives you the tools to get there.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5896,2265,'Homeschool Mom of 1','','','','2012-01-09 12:00:00','2012-01-09 12:00:00','I purchased this book and a few others to teach my son non traditional math.  He was doing horribly in math at school, not because he couldn\'t do it, but because he was bored to tears.  I started teaching him the math concepts in this book, he\'s in 4th grade, and he will do his math assignment without complaining which is so refreshing.<br><br>I marked the review down 1 star because I didn\'t like how the chapters were laid out.  The authors mix fractions into the division chapter and just seem to skip around more than I like.<br><br>I pulled the great information I liked out of the book and have recommended it to friends because this book has some techniques that are easier to follow than I found in other books.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5897,2265,'Gene Venable','','','','2009-09-04 12:00:00','2009-09-04 12:00:00','I found it very enjoyable and effective to go thru the exercises. The author has a way of describing the tricks that makes you want to apply them and have a great idea how to do so -- and it works.<br><br>Some of the chapters seemed superfluous, not really focused on the math stuff. I could have used even more practice -- as it is, I repeatedly went thru the same exercises to maximize my speed.<br><br>I think this could be enough to help someone\'s psychology into thinking they had become a math whiz -- and that\'s what being a whiz is, largely a matter of attitude!<br><br>This is also an effective book to read for a distraction; it\'s different enough from most people\'s concerns that someone angry or depressed or whatever might find this a great relief.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5898,2265,'L. Payne','','','','2010-10-21 12:00:00','2010-10-21 12:00:00','Whiles I haven\'t completed this book yet because I have 2 others that I\'ve been comparing. This one is certainly the most outstanding and interesting. I believe if one stays with this book and do the exercises provided there will be hardly any mental math problems you can\'t solve. I\'m talking addition subtraction multipling and division.The book is well written and narrated so you can easily understand whats being presented;all you have to do is follow the  instructions and do the exercises. Again a great book to help you improve or master your math efficiency!<br><br>\n  \nSecrets of Mental Math: The Mathemagician\'s Guide to Lightning Calculation and Amazing Math Tricks',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5899,2265,'Franco','','','','2008-03-15 12:00:00','2008-03-15 12:00:00','I\'m neither interested in squaring three-digit numbers in my head nor in doing mathematical magic. I\'m only interested in practical mental math. I did buy this book for chapter 5; *** Good Enough; The Art of \'Guesstimation\' ***. I\'ve been doing guesstimations for many years intuitively, not very structured. This fine chapter teaches beginners the art of guesstimation while experts can go back to the basics and hone their skills while they might discover something new ... I did do so with approximating years needed for trippling an investment given interest rates of X% p.a.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5900,2265,'Patrick G. Andre','','','','2009-03-02 12:00:00','2009-03-02 12:00:00','This is a great book if you have not found ways to perform calculations in your head.  These tricks and techniques will give you the tools you will need, but it requires practice (read: homework) to make them stick, and to make them easier.<br><br>However, if you ever find yourself without a calculator, or if you want to race someone on theirs, this will help you figure out these problems.  I have started doing most multiplication problems in my head instead of on a calculator.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5901,2265,'Kass','','','','2011-03-15 12:00:00','2011-03-15 12:00:00','This book has some interesting parts to share with your young kids, but I expected more tricks than what it has. My 5th grade daughter played with numbers for a while and then she found out there\'s lots of exception. Afterthat the book was placed in a bookself. It is a good math trick book to make your kids get some interesting on numbers.<br>I\'ve got this book about a week after ordering and I\'ve got a delivery e-mail 2 weeks after that.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5902,2265,'brandee','','','','2017-01-11 12:00:00','2017-01-11 12:00:00','My son flipped through it and said it looked boring but he is also a 13 year old boy living in a video game world so we shall see if he actually gives it a chance or if I might even give it a read',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5903,2265,'Alexandra Miliou','','','','2013-03-18 12:00:00','2013-03-18 12:00:00','I had met the author in Greece, at one of his \"educational\" trips. I was astonished with his magical math methods.  I had the pleasure to attend the lecture with my daughter and at the end of it we both decided that we must buy the book because of its interest.  We give this rate because we believe that it will help a lot.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5904,2265,'James Bradley','','','','2015-08-24 12:00:00','2015-08-24 12:00:00','With some revolutionary thoughts this book is somewhat controversial.  I mentioned some of the beginning precepts to an engineer friend and he was not impressed.  I however am impressed at the different look at how we understand math and am sure that I will use it when I tutor math students.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5906,2265,'C.joseph','','','','2019-07-15 12:00:00','2019-07-15 12:00:00','U cant go wrong whether learning, brushing up, or cumlaude.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5907,2265,'Marie R Hunt','','','','2012-12-30 12:00:00','2012-12-30 12:00:00','bought this book for my 13-yr old grandson for Christmas  he\'s always been good at math when he takes the time to read the problem, so I figured it was time for him to become an Mental Math Genius and I told him the book would help him  we shall see',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8224,3119,'WooCommerce','woocommerce@bookiino.com','','','2023-10-14 19:56:55','2023-10-14 19:56:55','PayPal transaction ID: 64M15345R2841581R',0,'1','WooCommerce','order_note',0,0),(8225,3119,'WooCommerce','woocommerce@bookiino.com','','','2023-10-14 19:56:56','2023-10-14 19:56:56','Order status changed from Pending payment to Completed.',0,'1','WooCommerce','order_note',0,0),(5909,2265,'Mona','','','','2017-05-07 12:00:00','2017-05-07 12:00:00','This book is good but you\'ll definitely need to write your hypotheses in a notebook to help your brain calculate the answers.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5910,2291,'German','','','','2014-07-28 12:00:00','2014-07-28 12:00:00','The solutions for the odd numbers don\'t seem to be available online anywhere, and the library didn\'t have this one either.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5911,2291,'houston_nanomag','','','','2008-09-28 12:00:00','2008-09-28 12:00:00','The book is excellent not only for giving the solution, but explaining the problem, clarifying what exactly is being asked and giving major guidelines for how to solve the problem. Thank you very much!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5912,2291,'Jose De Jesus Bueno','','','','2007-11-17 12:00:00','2007-11-17 12:00:00','The book was in excellent conditions and its content have been very useful. This is a book with a high level but at the same time easier to follow and understand. The examples shown are illustrative enough to consider that the topic was completely covered and understood.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5913,2291,'Daniela','','','','2020-11-01 12:00:00','2020-11-01 12:00:00','Make sure to purchase the textbook that goes along with this solutions book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5914,2291,'Tony','','','','2020-09-26 12:00:00','2020-09-26 12:00:00','Perfect',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5916,2291,'JOHN','','','','2019-04-18 12:00:00','2019-04-18 12:00:00','Good descriptive text',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5917,2291,'EBR','','','','2017-02-11 12:00:00','2017-02-11 12:00:00','Un interesante complemento al libro principal con soluciones desarrolladas a la mitad de los ejercicios. Conviene hacerse también con el libro principal para un repaso general de la teoría sin entrar en muchas sutilidades.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5918,2291,'Spring','','','','2014-05-19 12:00:00','2014-05-19 12:00:00','The solutions are great, although they do still expect you to be able to see certain interim steps - basic algebra etc.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5920,2291,'A.Vieira','','','','2016-02-15 12:00:00','2016-02-15 12:00:00','The book is ok. Really good for exercises.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5921,2291,'nabla','','','','2015-06-26 12:00:00','2015-06-26 12:00:00','good value, quick service',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5922,2291,'Alexander ','','','','2014-10-22 12:00:00','2014-10-22 12:00:00','Very good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5923,2291,'Omer Bayraksan','','','','2012-09-06 12:00:00','2012-09-06 12:00:00','Well prepared!<br>Still it needs further editing. There are some typing mistakes in equations..<br>Some solutions should also be reviewed..',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5924,2291,'Sotirios Mamalis','','','','2008-01-19 12:00:00','2008-01-19 12:00:00','The solutions manual of a very good book. Useful for instructors and students as well.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5925,2291,'Donald Mackinnon','','','','2021-09-02 12:00:00','2021-09-02 12:00:00','A good reviewing, and revision book with many pages of good examples.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5926,2291,'settermum','','','','2018-01-22 12:00:00','2018-01-22 12:00:00','Bought as birthday present for my brother who is doing an open university course.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5927,2291,'Afshana Z.','','','','2014-09-24 12:00:00','2014-09-24 12:00:00','Delivery was spot on.<br><br>I only bought this book since I bought the text book to it, and it was recommended by my professor at uni.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5928,2291,'Robert','','','','2016-03-24 12:00:00','2016-03-24 12:00:00','Every bit as good as the main textbook',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5929,2462,'Megs','','','','2017-02-26 12:00:00','2017-02-26 12:00:00','I think the unique format of this textbook is fantastic. When I read it, I can almost hear the authors voice. The material is very dense so it\'s definitely not meant for speed reading. The way the information is presented is straightforward -- it doesn\'t try to go over your head.<br><br>Get ready to learn mathematics from the ground up! Exciting stuff!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5930,2462,'Sarah Beaver','','','','2018-09-29 12:00:00','2018-09-29 12:00:00','Love this book. PROOFS 4 LIFE',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5931,2462,'Yawer','','','','2014-12-27 12:00:00','2014-12-27 12:00:00','PERFECT!!!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5932,2462,'jcc1324','','','','2011-05-17 12:00:00','2011-05-17 12:00:00','It\'s not a book for self-study, but I\'ve found it to be just about perfect for a transition-to-higher-math course:<br><br>There are plenty of propositions &amp; theorems interspersed through the text and left for the instructor to complete in class, or for the student to complete in assignments and/or for practice in lieu of problems at the end of sections or chapters.  I\'ve found that this makes homework assignments feel wonderfully relevant (and much more interesting than proving random theorems at the end of a section).  In addition, it gives an understanding of the structure of mathematics and how it works:  One can\'t prove a theorem that uses something that has not yet been proved; translated, only theorems, propositions, corollaries, and lemmas appearing earlier in the text can be used to prove the current statement.<br><br>Unproven statements that are not assigned as homework can be proved by the instructor concurrently with presentation of the material. This gives the students an opportunity to see some proofs written by someone other than the text authors -- every mathematician has a different style and approach and it\'s important for students to know that.<br><br>Nice projects throughout the text give an opportunity for students to explore mathematics: discover the theorem and then prove it (as opposed to the standard prove or disprove, though there are projects of that form as well).<br><br>The reminders at the end of every chapter are a wonderful idea.  Many students at this level have only experienced \"reading a math book\" as going back in the section to find an example similar to the problem on which he or she is currently working.  That isn\'t what it is, of course, and around midsemester when everything is getting busier for everyone, it\'s a good idea for students to be reminded of it.  (The other reviewer\'s joke about these comments is simply juvenile and ignorant.)<br><br>My students loved this book.  It\'s readable, clear, and concise.  And I very much enjoyed using it.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5933,2271,'Ragamuffin.','','','','2023-02-13 12:00:00','2023-02-13 12:00:00','The most influential book on the whole of the Western Civilization. This edition shows all the signs of a great way to get into the studying, at last, of this unparalleled work.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5934,2271,'Erin S.','','','','2022-07-20 12:00:00','2022-07-20 12:00:00','This book came super quickly, and incredible condition. My man loves learning and such a great book for people who love to learn. I was incredibly happy with how sturdy the composition of the book was! Definitely a must have book! 😊',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5935,2271,'J B Anderson','','','','2018-11-07 12:00:00','2018-11-07 12:00:00','This is an impressive work of scholarship &amp; I highly recommend it to all serious students of physics.<br> The authors set out to produce a modern translation of the third and final version of Newton\'s masterpiece which was originally written in Latin and published in 1726.<br>The first &amp; only complete English translation of the Principia, before this new translation was made, was by Andrew Motte in 1729 - only three years after Newton\'s work in Latin appeared.<br>Motte\'s translation was revised and \"modernized\" several times in the intervening 270 years, the last being in the mid 1800\'s but it still was regarded as being almost as difficult and opaque as Newton\'s original.<br>This new translation by Cohen &amp; Whitman is really two books in one. The first 370 pages of the 966 page work is \"A Guide to Newton\'s Principia\" and consists of eleven Chapters that explain the structure of Newton\'s work and how to read it. This part is indispensable to the modern reader. The last 596 pages is a careful translation into modern English of the original Latin version.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5936,2271,'L. Miller','','','','2007-06-10 12:00:00','2007-06-10 12:00:00','I am writing my dissertation on Newton and have found this translation incredibly helpful and surprisingly readable.<br><br>The Principia is one of the most difficult and inaccessible books ever written -- so much so, in fact that even John Locke (himself a pretty smart guy) had to ask Christian Huygens to explain much of it to him.  This difficulty was intentional, because Newton did not want people who only understood math a little to try and undermine his arguments. For this reason, he rewrote book three so that only those who had read and understood book 1 could understand its concepts.<br><br>People laugh when I tell then that I own a book with a three hundred page introduction, but it\'s a book that needs a three hundred page intro. In their intro, Cohen and whitman describe the history of the principia, its structure, an explanation of where prior translations have fallen short, and -- most importantly -- note which of the Principia\'s sections have been most significant during and after Newton\'s time. This is helpful so that when you get to each section, you are more likely to notice which elements may have seemed most controversial, where he is taking down Descartes\' vortices, etc. I\'m not saying I agree 100% with cohen and whitman on all of their points, but they have produced a work that does not simply translate the book; it also shares the writers\' substantial knowledge about the principia.<br><br>This is an essential and monumental translation. If you are at all interested in early modern science, you must own it.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5937,2271,'Isabel C','','','','2016-11-29 12:00:00','2016-11-29 12:00:00','This is the work which, for better and for worse, changed how we humans live forever, uniting the heavens and earth under a satisfying physical theory for the first time. The English translation is smooth enough that it feels like Newton wrote the work \'yesterday\'. The introductory sections by Cohen give a detailed overview of the work itself and the broader context in which it was written, which helps in recognising some  mathematical presentation and concepts we no longer use or are unfamiliar with.<br><br>The overall methods used in the Principia have found their use throughout modern physics practice--mathematical modelling, idealisations, theory-mediated measurements, etc. Even with the advent of General Relativity and Quantum Field Theory, we still do physics (in a broad fashion) in a way which is present in this book. No wonder, as a physicist-in-training, I found this work to be an exemplar, despite the less-than-satisfying results in some sections, as Newton himself admitted, of how natural science is to be done (notwithstanding its limitations, as unfortunately we learned the hard way).',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5938,2271,'Jacques Richer','','','','2021-07-09 12:00:00','2021-07-09 12:00:00','A very high quality work.  Very readable even for a non-anglophone.<br>The French translation by La Marquise du Chastellet (1756) is also excellent,<br>but the old typography (and slightly old French) makes it harder reading.<br>Both translations nicely plunge the reader in a long voyage into a remote and fascinating past.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5939,2271,'Curt Renz','','','','2017-02-11 12:00:00','2017-02-11 12:00:00','This is the book that set the stage for the Industrial Revolution and our modern world. Newton taught us that nature and relations among material objects can be predictable. If a person understands physics (natural philosophy and its related mathematics), he/she can design a machine on a blueprint, and it might actually work. Useful things can be invented, and not merely discovered through serendipity or trial and error.<br><br>Newton cleverly employed the method of Euclid by first assuming the truth of three axioms (or laws) of motion and demonstrating their consequences for other concerns through deductive logic. Reading the original (or in this case an English translation from Latin) can be most enlightening.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5940,2271,'Johnnie  ','','','','2021-03-07 12:00:00','2021-03-07 12:00:00','Super good deal on a hard cover copy of a classic. This is also a good edition. The commentary is helpful, but is also very thick. Still a good deal, would recommend.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5941,2271,'Michael Bosse','','','','2017-01-07 12:00:00','2017-01-07 12:00:00','This is the definitive reference for anyone who genuinely has an interest in the basic historical foundations of mathematics, physics, and cosmology. It is a heavy undertaking to study this book and I found myself somewhat lulled by my modern mathematical training into expecting equations and formal proofs via induction upon formulae. This book forms the basis for calculus and mathematical physics entirely on the foundation of geometry and nearly every proof is geometrical in origin. Having the guide as an integral part of this book helped to soften the transition from my more modern expectations and opened my mind to this great work of the past.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5942,2271,'Bill Harvey','','','','2023-08-23 12:00:00','2023-08-23 12:00:00','1. Laws of Motion: Newton\'s three laws of motion are fundamental principles that describe the relationship between the motion of an object and the forces acting upon it. They provide the basis for understanding the dynamics of objects and the behavior of forces in the physical world.<br><br>2. Law of Universal Gravitation: Newton\'s law of universal gravitation states that every particle in the universe attracts every other particle with a force directly proportional to their masses and inversely proportional to the square of the distance between them. This law explains the force responsible for the motion of celestial bodies and forms the basis of classical mechanics.<br><br>3. Mathematical Formulation: Newton introduced a mathematical formulation for expressing his laws of motion and the law of universal gravitation. He employed calculus, which he developed simultaneously with Gottfried Leibniz, to describe and quantify the relationship between physical quantities and their rates of change.<br><br>4. Celestial Mechanics: Newton applied his laws of motion and the law of universal gravitation to the study of celestial bodies. He demonstrated that the same principles govern the motion of both terrestrial and celestial objects, providing a unified understanding of the physical world.<br><br>5. Three-Body Problem: Newton\'s work on celestial mechanics addressed the challenging problem of understanding the motion of three celestial bodies under their mutual gravitational influence. While he was unable to find a general analytical solution, his insights laid the groundwork for future developments in the field.<br><br>6. Conservation Laws: Newton\'s laws of motion include the concepts of conservation of momentum and conservation of angular momentum. These principles state that the total momentum and total angular momentum of an isolated system remain constant, providing important insights into the behavior of objects and systems.<br><br>7. Pendulum Motion: Newton\'s Principia contains an analysis of the motion of pendulums, which are oscillating systems commonly found in clocks. He provided mathematical equations that describe the motion of a pendulum under different conditions, contributing to the understanding of periodic phenomena.<br><br>8. Optics: Newton\'s Principia includes a section on optics, where he explored the behavior of light and developed his theory of colors. He conducted experiments with prisms, demonstrating that white light is composed of a spectrum of colors and introducing the concept of the refractive index.<br><br>9. Inertia: Newton\'s first law of motion, also known as the law of inertia, states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. This concept established the idea of inertia and is a fundamental principle in classical mechanics.<br><br>10. Mathematical Rigor: Newton\'s Principia is known for its rigorous mathematical approach to physics. By grounding his laws in precise mathematical formulations and equations, Newton elevated the study of mechanics to a new level of precision and laid the groundwork for future scientific inquiry.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5943,2271,'Fabio Menezes de S. Lima','','','','2019-08-19 12:00:00','2019-08-19 12:00:00','I couldn\'t even imagine that this book would be so complete and detailed. The guide is crucial for those interested in understanding Newton\'s original definitions, theorems, and (mainly) demonstrations.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5944,2271,'Wan Koon Yat','','','','2001-08-05 12:00:00','2001-08-05 12:00:00','I don\'t think anymore words needed to describe this greatest work of all time! Pricipia is difficult to read, that is no doubt. But the impact of this book and its consequent influence to our world will never and never be overestimated. With the advent of Principia, our world will never be the same again! Even with the advent of relativity, I don\'t think there is hardly any scratch on this book. As the activities of our daily living and even in astronomical field, except when the speed of an object is approaching light, Newton\'s law is still the prime theory to govern it! Actually this book should be rated as 10 stars! In fact this book needs not to be rated!!!!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5945,2271,'Carly','','','','2019-12-25 12:00:00','2019-12-25 12:00:00','It came just as expected, I bought it for my boyfriend for Christmas because he loves Physics!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5946,2271,'M. McGuire','','','','2018-03-24 12:00:00','2018-03-24 12:00:00','An amazing job by Cohen and Whitman. If your Euclidean geometry is as shaky as mine, Newton is much harder to understand than Einstein. Guicciardini\'s book on Newton is very informative, also hard.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5947,2271,'Douglas Meyer','','','','2018-03-02 12:00:00','2018-03-02 12:00:00','I look forward to conquering this book. This is a \"must own\" item for anyone who is passionate about mathematics. It arrived quickly and the book is brand new. It came via USPS.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5948,2271,'Larry Delano Coleman','','','','2012-03-31 12:00:00','2012-03-31 12:00:00','I undertook the gratuitous study of this classic in obedience to the command of the Holy Spirit and to the inexorable tug of intellectual rigor which nature study and reading classical literature induces. It has deepened and quickened my mind and spirit immeasurably. A cadre of others have joined me along the way, greatly aiding my effort.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5949,2271,'Ivan Mojica','','','','2019-09-23 12:00:00','2019-09-23 12:00:00','One of the most beautiful books I ever had',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5950,2271,'David Duncum','','','','2017-10-25 12:00:00','2017-10-25 12:00:00','Even after all centuries have passed, it is still the greatest science book ever.  Einstein is a close second.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5951,2271,'Madcustomer','','','','2018-03-20 12:00:00','2018-03-20 12:00:00','Well written book that can keep you interested in the works of pioneering scholars of yeter years.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5952,2271,'bej','','','','2017-11-06 12:00:00','2017-11-06 12:00:00','What\'s not to love? If you get this book, there are some real historical gems in the beginning!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5953,2271,'John W. Fowler','','','','2015-12-02 12:00:00','2015-12-02 12:00:00','An excellent translation (to my knowledge, the canonical one) of Newton\'s masterpiece. Of great interest to historians of science and anyone interested in the development of philosophical notions applied to the physical universe.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5954,2271,'Josh White','','','','2014-08-26 12:00:00','2014-08-26 12:00:00','Fantastic translation, Fantastic Material, and was shipped promptly and in good packaging and condition.<br>One thing, this is a must read for any college student, especially if your major is heavy in mathematics, like engineering, for example.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5955,2271,'Kelly Campbell','','','','2020-01-14 12:00:00','2020-01-14 12:00:00','It’s good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5956,2271,'Charles P. Goodyear','','','','2018-12-29 12:00:00','2018-12-29 12:00:00','The various edits open one to a new understanding.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5957,2271,'kevinvon','','','','2016-03-14 12:00:00','2016-03-14 12:00:00','This 2016 U California Press edition is of high printing quality and good price ($20+). Note that, there is a translation only edition (without guide) at even lower price.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5958,2271,'randy baker','','','','2019-04-25 12:00:00','2019-04-25 12:00:00','This is the meat and potatoes!!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5959,2271,'Edward G. Sauer','','','','2017-09-26 12:00:00','2017-09-26 12:00:00','This is a fantastic translation of an iconic reference. Very helpful and readable.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5960,2271,'an eclectic consumer','','','','2010-07-07 12:00:00','2010-07-07 12:00:00','The latest edition/translation of Newton\'s Principia is the result of the work of some of the best scholars on Newton\'s work from the latter half of the 20th century on.  The additional auxiliary material is useful.  Things put correctly in more modern English also helps.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5961,2271,'Carlos Carrillo','','','','2014-02-28 12:00:00','2014-02-28 12:00:00','I was very happy with everything from the time it took to get here to the book itself. Big fan of Newton so had to get this for the collection for sure!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5963,2271,'Stanislav Jura','','','','2018-02-05 12:00:00','2018-02-05 12:00:00','Many thanks for this edition. It simply fantastic.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5964,2271,'Andy','','','','2019-01-15 12:00:00','2019-01-15 12:00:00','A+',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5965,2271,'mysahin','','','','2018-10-20 12:00:00','2018-10-20 12:00:00','Very good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5969,2271,'dmena','','','','2013-03-24 12:00:00','2013-03-24 12:00:00','This book is a wonderful book that helps you know what Newton was thinking. There is nothing I dislike about this book.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5970,2271,'Juan','','','','2017-01-21 12:00:00','2017-01-21 12:00:00','Great price and speedy delivery.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5971,2271,'Jim A','','','','2016-02-18 12:00:00','2016-02-18 12:00:00','It\'s a classic. Believe me, it\'s a hard read.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5972,2271,'Steven Shepherd','','','','2016-03-02 12:00:00','2016-03-02 12:00:00','Excellent condition.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5973,2271,'Kenneth Ellman','','','','2008-07-06 12:00:00','2008-07-06 12:00:00','From Kenneth Ellman, Box 18, Newton, New Jersey 07860, ke@kennethellman.com<br>\"I hope that, decades from now, when I and my other books have been forgotten, this will still be useful to scholars and students\".  So spoke Harvard University Professor I. Bernard Cohen some years before his death in 2003. His co-translator Anne Whitman had died in 1984. The translation and the extraordinary commentary is 974 pages long and took 15 years to complete. I have had this edition for many years and in reading it again I decided to write this review.  I feel grateful to Cohen and Whitman for what they accomplished.<br><br>This particular edition by Cohen and Whitman of The Principia stands alone (as far as I know) in making one feel that a teacher, guide, and historian are holding your hand while exploring and understanding one of the most dramatic and powerful scientific and mathematical treatise ever written. I am surprised at some of the reviews here in that they seem to discuss the applicability or utilization of The Principia as a Physics or Math textbook. This is certainly not a textbook in the modern sense in any respect. This is not a book you would use to prepare for any normal Physics or Math examination. It must be kept in mind that this book by Newton was a human accomplishment and this particular edition with its extensive commentary by Cohen lets one be exposed to both the scientific rigor and social aspects of the world of Isaac Newton. And due to the fact of Newton\'s extraordinary scientific and mathematical accomplishment it caused historical alteration in the course of human events as does each great expansion of human knowledge. Sometimes when mathematical expressions and concepts of Physics are portrayed we forget that the ideas are first and foremost a human experience, it is not some distant and inscrutable theory but part of our most intimate life. We try to understand what we are and where we are. In the days of Isaac Newton Natural Philosophy was thought of as an expression and search for the truth and mathematics was sometimes able to be the handmaiden of this exploration. Unfortunately, from my point of view, philosophy has become detached from much of mathematics and this has done a disservice to both Physics, Math and what is currently thought of as Philosophy. I see no advantage in this current day separation and when immersing yourself in this edition of The Principia, there is a longing for those days now past when there was a unification of science and philosophy.<br>There is little reason in this review to explain the significance both mathematically and historically of the writing of Isaac Newton. Whether a student is using a conventional Physics textbook to master the understanding, laws and calculations described in The Principia or is exercising physics problems to show facility and prepare for an examination, each and every aspiring learner is obligated to master the ideas and knowledge as expressed in The Principia one way or another. Certainly our current day Physics textbooks do not teach as Isaac Newton taught and wrote. The Principia is not a book normally used to prepare for any Physics examination whether in High School or University. But the law of science and math as expressed in The Principia is as valid in general application today as it was in 1729. Our understanding of the laws of Newton as they relate to later discovered equations and expressions, including Relativity, does alters our knowledge of applicability of Newtonian physics. It does show the limitations of our belief in the immutable Laws of Nature, including those mathematical laws. In some respects radically so. So, it really depends upon the demands you put upon the math and knowledge as expressed in The Principia. Do not read Isaac Newton in the light of Albert Einstein and others. First read Newton in the light of his age, then step back and remember how we have continued along this amazing path to knowledge. So The Principia is another place in our human endeavor. This is not just a book for mathematicians. As related on pages 297 and 298 that wonderful contemporary of Newton, John Locke, without benefit of full mathematical understanding was still able to comprehend the ideas within. So will you. This is by far the best edition of The Principia I have ever read. Kenneth Ellman, Box 18, Newton, New Jersey 07860 , ke@kennethellman.com',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5974,2271,'V. K. Lin','','','','2004-09-07 12:00:00','2004-09-07 12:00:00','This is a wonderful reference, but frankly, it was overwhelming for me.  Let\'s just say that while the first two sections of this book were clear, informative, meticulously and thoroughly footnoted and annotated, the last section-- the actual translation-- proved beyond my abilities.  I\'d HIGHLY recommend a college-level geometry course before attempting to read the actual translation of Newton\'s revolutionary work.<br><br>Frankly, the combination of archaic verbiage (Cohen kept a number of obsolescent terms in translating from the original Latin), combined with a predominately narrative style (reading in an entire paragraph what can in modern mathematical symbology be articulated in a single line) combined with my lack of working analytic geometry enabled me to follow this seminal work conceptually, but not in detail.  Other reviwers have suggested that a working knowledge of calculus and Newtonian physics is required.  I disagree.  To follow Newton\'s proofs in detail, it is Euclidean geometry that is required.  Newton\'s Principia CONCEPTUALLY utilizes calculus, but the proofs themselves are Euclidean with the concept of \"infinitisimally small\" added to the equation.  I have single- and multi-variable calculus, linear algebra, differential equations (first-, second-order, and partial), and graduate-level statistics under my belt.  Junior high school geometry is insufficient to understand his work.  So far, I am studying tensors, differential geometry/exterior calculus with respect to gravitation physics without too much difficuly.  Geometry!<br><br>Otherwise, this book was wonderful.  Section One is a thoroughly researched historical background.  Social setting, scientific thought at the time, the controversies of the times, historical perspective, insights into Newton himself.  Wonderfully referenced and annotated.<br><br>Section Two is a clear \"How to Read\" section-- discussing section by section of the Principia what the main concepts and issues are, even critiquing Newton\'s flaws and obvious attempts to fill in gaps or alter data when existing data were insufficient to his theories!  Cohen even guides us step-by-step through some of the more important proofs in the Principia-- proofs that for the most part I followed, except for certain geometric assumptions that I had to assume were true.<br><br>My fascination has always been relativity... which I am working on understanding now.  When finished, I may read a college-level text in analytic geometry, then come back to this.  But I was impressed by the sheer breadth of conceptual material Newton covered.  Certainly entitling his last book of The Principia \"The System of the World\" was justified.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5975,2271,'Alex','','','','2001-08-28 12:00:00','2001-08-28 12:00:00','Hi, folks. I suffered through college math all the way through differential equations, and I never really \"got\" it. I just memorized the steps and, when exam time rolled around, hoped I could remember which procedure went with which problem. The light finally came on in grad school, and _Principia_ was the switch. Reading the _Principia_ let me get underneath formal calculus and imbued it with a sense of wonder and soul. To see the theory set out step-by-step, to follow with Newton as he envisioned a new way of painting the world, gave me the ability to internalize the calculus, to say, finally, \"Yes, that\'s intuitively right.\" I wish I\'d read the _Principia_ much earlier in my education. It would have saved me a lot of pain.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5976,2271,'C. Morales','','','','2000-11-13 12:00:00','2000-11-13 12:00:00','I\'ve seen bad reviews for master works of science in the past. Mostly they claim these books are either not clear or impossible to understand. Don\'t buy this book for the purpose of learning Classical Mechanics or Calculus from it, but for the scientific curiosity of learning how the great Isaac Newton presented his revolutionary scientific ideas to the world. Of course, it is difficult to read. This is a translation of a book written in Latin more than 300 years ago!<br>This book is a jewel. Just like the original works of Einstein, Maxwell, Heisenberg, Schroedinger and all those giants. Many of the ideas presented in the book were written for the first time in history and probably they are not organized in a didactic form. The person buying this book should not expect to find a clear textbook when originally it was not written for the layman, but for the expert scientific community of its time. Buy this book, sit back, scan through it, and enjoy a true piece of history.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5977,2271,'R. Bailin','','','','2012-08-26 12:00:00','2012-08-26 12:00:00','This isn\'t a book that you take to the beach and knock out in a few hours.  The ideas contained in this stunning masterpiece defined the blueprint for the world that we inhabit.  One wonders what the world would be today if Isaac Newton hadn\'t lived.  It\'s an extraordinary work and along w/ the Origin of the Species one of the 2 books that must be read by anyone able to read.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5978,2271,'Starry Knight','','','','2002-03-02 12:00:00','2002-03-02 12:00:00','Forgive me first of all for even attempting this review of \"The Principia\"...but would any of you attempt to even review the Bible, the Quran or the Bhagvad Gita...??? The Principia is something that should be worshipped not as the work of a mere mortal, but that of the greatest genius of all time... this was the pinnacle of thought, and none since Newton\'s time has come even close to matching his scientific prowess...forget Einstein, even he did not consider himself worthy of comparison with Newton, for Newton was a theoretician par experimentor par excellence...(Einstein was often apalled by his own poor ability to experiment)..<br>Here was where Newton introduced his theory of gravity and theory of light and his version of the Calculus...but a word of caution...be afraid, DO NOT attempt to learn these subjects from this book...the real purpose of this book is this...to hold it in your hand\'s and dissolve into tears as you read the mind of the man who came closest to reading God\'s thoughts...when, years later, Newton was asked how he hit upon his ideas, he replied \"By thinking upon them \" !! How very helpful, eh..??<br>Buy this book, treasure it, read it if you can, and all the while, remember Alexander Pope\'s words:<br>\"Nature and Nature\'s laws<br>lay hid in the night;<br>God said \'Let Newton be !\',<br>And all was light !\"',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5979,2271,'Jordi Vilalta Lopez','','','','2003-05-12 12:00:00','2003-05-12 12:00:00','[...]<br>It was very difficult to grasp in Latin (I\'ve had a try on it), not that much easy in the Motte facsimile translation (I can assure it), and the Cajori-Motte edition was only half modernized and otherwise flawed.<br><br>This edition, sponsored by I.B. Cohen (the Latin editor) gives us a fresh, modern English translation of the text, and -almost as thick- a guide to using and reading this all-important book, which is not -as everybody is aware- an easy reader. One word of caution: Newton was, of course (pace Leibnitz), the discoverer of calculus, but he doesn\'t use it here, but \"more geometrico\" rigorous proofs, much in the style of that other genius of all ages, Archimedes. If you need help grasping the contents and impact of this work, then you must get some book like DENSMORE, D., Newton\'s Principia: The Central Argument (other auxiliary books are commented in the Guide potion of the book I\'m reviewing).',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5980,2271,'Mathdoc','','','','2000-12-10 12:00:00','2000-12-10 12:00:00','I am responding to the person who wrote the second review, the student who decided to use this book to study for an exam in basic calculus. What are you, crazy? Why would ANYONE think they could learn \"baby calc\" from the great book in which Newton elucidated his theory of the universe!? Did you think about asking anyone, first? I\'m a college math prof and my guess is that ANY math teacher would have suggested you study from a modern, elementary calc book, instead. (Then you make matters worse by giving the book a bad review!) At any rate, if you would like a good, modern translation of Newton\'s Principia, this is the place to go. You really should know some calc and basic mechanics, however - remember, this book, was written by one of the greatest minds in the human history, and it was NOT meant to be a textbook for the novice. Please do not let review # 2 steer you away..........',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5981,2271,'Andrew W. Hagen','','','','2003-05-10 12:00:00','2003-05-10 12:00:00','Among a very select few others including the Bible and the Code of Hammurabi, this is one of the most important books ever written. This is where Isaac Newton first publicly put forth the calculus and the scientific method. A tremendous intellectual rupture that we are still dealing with, this book was indirectly responsible for historical shifts such as the Enlightenment and the Industrial Revolution. No mean feat.<br><br>The Principa is not an introductory calculus for the modern reader. It is written in Newton\'s own notational style. This style is different from the modern one, used in calculus today. The modern calculus notation system was devised by Leibniz. Newton\'s system of notation proved less useful than Leibniz\'s, and the better one has won out. Leibniz had independently discovered the calculus prior to the publication of Principia. Thus, Leibniz was not influenced by Newton\'s notational style. Leibniz\'s discovery of the calculus was made in secret on the continent several years after Newton had made his own secret discovery of it in Britain. Leibniz\'s work was published only after Newton\'s Principia was published. This led Newton to wrongly believe that his work had been stolen. An epic debate between the British and Continental academies ensued with each side championing their man.<br><br>This book has enormous historical interest. For a person who is already educated in calculus, this book will take you to the source of the subject matter, the mouth of the Nile, so to speak. As for the scientific method, this is where it was conceived.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5982,2271,'Jeff','','','','2005-09-20 12:00:00','2005-09-20 12:00:00','The Principia is the basis for much of modern science.  It is swallowed hook, line and sinker by mathematicians and people in physics as a \'holy grail.\'  It is a continuation of very old fashioned thinking, hooked on \'cause and effect\' relationships, Aristotelian in nature.  One would think that modern science could see through this veil of antiquity, but seemingly has not yet had the courage to do so.<br><br>It is essential reading, however, so see how far \'science\' has not moved for nearly 400 years.<br><br>This particular translation is of interest in that half of the book tries to explain and support the original text.  Bit too hard of a sell to justify Newton\'s arguments.  Again, it is a must-read for anyone seeking to understand the flaws of modern \'science.\'',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5983,2271,'osapientia','','','','2018-06-30 12:00:00','2018-06-30 12:00:00','i can only comment on the work itself which is monumental in terms of mathematics and physics. we would have no account of how the planets rotate and move without Newton. this work shows you how he did it, and it is mind blowing. be forewarned, you must have a background in both in both euclidean geometry and apollonious of perga (conics). without knowing these works, you will NOT understand newtonian physics.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5985,2271,'Rafael Lopez','','','','2006-08-10 12:00:00','2006-08-10 12:00:00','What I have to say is Newton.... What else are you lookin for in a Physics book. Ohh yeah the only problem it has that its size is such a college book(huge), and it is not hard cover.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5986,2271,'Naman kumar','','','','2018-02-10 12:00:00','2018-02-10 12:00:00','It is best best book for student who seriously want to study principia',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(5987,2271,'luiz nascimento','','','','2016-04-19 12:00:00','2016-04-19 12:00:00','Newton deserves a solid treatment. Maybe that\'s why few people face the challenge.<br>The authors were very successful.Especially when dealing with the \'in between\'  of the three<br>main Editions.<br>Nice job.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0);

INSERT INTO `wp25_comments` (`comment_ID`, `comment_post_ID`, `comment_author`, `comment_author_email`, `comment_author_url`, `comment_author_IP`, `comment_date`, `comment_date_gmt`, `comment_content`, `comment_karma`, `comment_approved`, `comment_agent`, `comment_type`, `comment_parent`, `user_id`) VALUES (7970,2480,'Henry','','','','2021-02-23 12:00:00','2021-02-23 12:00:00','I spent about 4 months, on and off, and finally finished reading this great book. I have a dual purpose: (a) I wanted to quickly recover my knowledge in math and physics I acquired during my prior physicist career, and (b) I wanted to see if I could apply anything I learnt from here to the machine trading models as introduced in the book \"Forecasting and Timing Markets: A Quantitative Approach.\" I really enjoyed this book and indeed found a lot of similarities and dissimilarities between building mathematical models for interpreting the real physical world and building models for forecasting market.<br><br>Here is a summary of what I have found out to be very applicable and useful:<br><br>(1) p.7: What laws govern our universe? How shall we know them? How may this knowledge help us to comprehend the world any hence guide its actions to our advantage? ... Eventually, even the much more complicated apparent motions of the planets began to yield up their secrets, revealing an immerse underlying precision and regularity.<br>(2) p.18: Fig. 1.3 Three \'worlds\' - the Platonic mathematical, the physical, and the mental - and the three profound mysteries in the connections between them. ... everything in the physical universe is indeed governed in completely precise detail by mathematical principles. ... all actions in the universe could be entirely subject to mathematical laws.<br>(3) p.28: Euclid\'s first postulate effectively asserts that there is a (unique) straight line segment connecting any two points. His second postulate asserts the unlimited (continuous) extendibility of any straight line segment. His third postulate asserts the existence of a circle with any centre and with any value for its radius. Finally, his fourth postulate asserts the equality of all right angles.<br>(4) p.45: We are to think of a light, straight, stiff rod, at one end P of which is attached a heavy point-like weight, and the other end R moves along the asymptote.<br>(5) p.67: The system of complex numbers is an even more striking instance of the convergence between mathematical ideas and the deeper workings of the physical universe.<br>(6) p. 109: What about the places where the second derivative f\'\'(x) meets the x-axis? These occur where the curvature of f(x) vanishes. In general, these points are where the direction in which the curve y = f(x) \'bends\' changes from one side to the other, at a place called a point of inflection.<br>(7) p. 115: Armed with these few rules (and loads and loads of practice), one can become an \'expert\' at differentiation without needing to have much in the way of actual understanding of why the rules work! This is the power of a good calculus.<br>(8) p.151: Air, of course, consists of enormous numbers of individual fundamental particles (in fact, about 10^20 of them in a cubic centimeter), so airflow is something whose macroscopic description involves a considerable amount of averaging and approximation. There is no reason to expect that the mathematical equations of aerodynamics should reflect a great deal of the mathematics that is deeply involved in the physical laws that govern those individual particles.<br>(9) p. 211: It seems that Nature assigns a different role to each of these two reduced spin-spaces, and it is through this fact physical processes that are reflection non-invariant can emerge. It was, indeed, one of the most striking unprecedented discoveries of 20th-century physics (theoretically predicted by Chen Ning Yang and Tsung Dao Lee, and experimentally confirmed by Chien-Shiung Wu and her group, in 1957) that there are actually fundamental processes in Nature which do not occur in their mirror-reflected form.<br>(10) p. 217: For example, the configuration space of an ordinary rigid body in Euclidean 3-space is a non-Euclidean 6-manifold.<br>(11) p.223: As in Sec 10.2, we have the notion of a smooth function (Phi), defined on manifold M.<br>(12) p.388: He (Newton) had originally proposed five (or six) laws, law 4 of which was indeed the Galilean principle, but later he simplified them, in his published Principia, to the three \'Newton\'s laws that we are now familiar with.<br>(13) p. 390: It is remarkable that, from just these simple ingredients (Newton\'s formula GmM/r^2), a theory of extraordinary power and versatility arises, which can be used with great accuracy to describe the behavior of macroscopic bodies (and, for most basic considerations, submicroscopic particles also), so long as their speeds are significantly less than that of light.,<br>(14) p. 392: Galileo\'s insight does not apply to electric forces; it is a particular feature of gravity alone.<br>(15) p. 410: We shall also begin to witness the extraordinary power, beauty, and accuracy of Einstein\'s revolutionary theory.<br>(16) p. 412: The geometries of Euclidean 2-space and 3-space are very familiar to us. Moreover, the generalization to a 4-dimensional Euclidean geometry E^4 is not difficult to make in principle, although it is not something for which \'visual intuition\' can be appealed to.<br>(17) p. 455: Einstein\'s famous equation E = mc^2 tells us that mass and energy are basically the same thing and, as Newton had already informed us, it is mass that is the source of gravitation.<br>(18) p. 462: Einstein originally introduced this extra term, in order to have the possibility of a static spatially closed universe on the cosmological scale. But when it became clear, from Edwin Hubble\'s observations in 1929, that the universe is expanding, and therefore not static, Einstein withdrew his support for this cosmological constant, asserting that it had been \'his greatest mistake\' (perhaps because he might otherwise have predicted the expansion of the universe!). Nevertheless, ideas once put forward do not necessarily go away easily. The cosmological constant has hovered in the background of cosmological theory ever since Einstein first put it forward, causing worry to some and solace to others. Very recently, observations of distant supernovae have had most theorists to re-introduce / (greek lambda), or something similar, referred to as \'dark energy\', as a way of making these observations consistent with other perceived requirements.<br>(19) p. 466: The timing of these signals is so precise, and the system itself so \'clean\', that comparison between observation and theoretical expectation provides a confirmation of Einstein\'s general relativity to about one part in 10^14, an accuracy unprecedented in the scientific comparison between the observation of a particular system and theory.<br>(20) p.490: He (Hilbert) appears to have believed that his total Lagrangian gives us what we would now refer to as a \'theory of everything\'.<br>(21) p. 503: ... it took many years for Einstein\'s original lonely insights to become accepted.<br>(22) p. 523: Heisenberg\'s uncertainty relation tells us that the product of these two spreads cannot be smaller than the order of Planck\'s constant, and we have Delta-p Delat-x &gt;= h_bar / 2.<br>(23) p. 528: I denote Schrodinger evolution by U and state reduction by R. This alternation between these two completely different-looking procedures would appear to be a distinctly odd type of way for a universe to behave!<br>(24) p. 541: As the state of the arts stands, one can either be decidedly sloppy about such mathematical niceties and even pretend that position states and momentum states are actually states, or else spend the whole time insisting on getting the mathematics right, in which case there is a contrasting danger of getting trapped in a \'rigour mortis.\'<br>(25) p.686 (Chapter 27 The Big Bang and its Thermodynamic Legacy): What sorts of laws shape the universe with all its contents? The answer provided by practically all successful physical theories, from the time of Galileo onwards, would be given in the form of a dynamics - that is, a specification of how a physical system will develop with time, given the physical state of of the system at one particular time. These theories do not tell us what the world is like; they say, instead: \'if the world was like such-and-such at one time, then it will be like so-and-so at some later time\'.<br>(26) p.687: The usual way of thinking about how these dynamical laws act is that it is the choice of initial conditions that determines which particular realization of the dynamics happens to occur. Normally, one thinks in terms of systems evolving into the future, from data specified in the last, where the particular evolution that takes place is determined by differential equations.<br>(27) p.689: What about evolution into the past, rather than the future? It would be  a fair comment that such \'chaotic unpredictability\" is normally much worse for the \'retrodiction\' that is involved in past-directed evolution than for the \'prediction\' of the normal future-directed evolution. This has to do with the Second Law of thermodynamics, which in its simplest form basically asserts: Heat flows from a hotter to a cooler body. ... This procedure of dynamic retrodiction is clearly a hopeless prospect in physics. ... For this kind of reason, physics is normally concerned with prediction, rather than retrodiction.<br>(28) p. 760: Of course, it might indeed ultimately turn out that there is simply no mathematical way of fixing certain parameters in the \'true theory\', and that the choice of these parameters is indeed such that the universe in which we find ourselves must be so as to allow sentient life. But I have to confess that I do not much like that idea!<br>(29) p. 850: But to take this position is to part company with one of the basic principles  of Einstein\'s theory, namely the principle of general covariance.<br>(30) p. 935: ... A lot of these stem from the fact Einstein\'s theory is \'generally covariant\' (Sec 19.6).<br><br>Finally, I have to say that I really like so many drawings in the book, which are simplistic yet stupendously expressive. Thanks Professor Penrose for sharing your knowledge and achievements of many decades, which will benefit many on this planet called Earth!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8137,3062,'WooCommerce','woocommerce@bookiino.com','','','2023-09-06 08:12:58','2023-09-06 08:12:58','PayPal transaction ID: 4F631070FX5264848',0,'1','WooCommerce','order_note',0,0),(8138,3062,'WooCommerce','woocommerce@bookiino.com','','','2023-09-06 08:13:01','2023-09-06 08:13:01','Order status changed from Pending payment to Completed.',0,'1','WooCommerce','order_note',0,0),(8139,3063,'WooCommerce','woocommerce@bookiino.com','','','2023-09-06 13:58:54','2023-09-06 13:58:54','PayPal transaction ID: 0UB34594BV388722N',0,'1','WooCommerce','order_note',0,0),(8140,3063,'WooCommerce','woocommerce@bookiino.com','','','2023-09-06 13:58:55','2023-09-06 13:58:55','Order status changed from Pending payment to 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Completed.',0,'1','WooCommerce','order_note',0,0),(8181,3089,'WooCommerce','woocommerce@bookiino.com','','','2023-09-25 07:25:27','2023-09-25 07:25:27','PayPal transaction ID: 0XX809478H232522G',0,'1','WooCommerce','order_note',0,0),(8182,3089,'WooCommerce','woocommerce@bookiino.com','','','2023-09-25 07:25:29','2023-09-25 07:25:29','Order status changed from Pending payment to Completed.',0,'1','WooCommerce','order_note',0,0),(8183,3090,'WooCommerce','woocommerce@bookiino.com','','','2023-09-26 18:33:25','2023-09-26 18:33:25','PayPal transaction ID: 25U03969CB119464H',0,'1','WooCommerce','order_note',0,0),(8184,3090,'WooCommerce','woocommerce@bookiino.com','','','2023-09-26 18:33:28','2023-09-26 18:33:28','Order status changed from Pending payment to Completed.',0,'1','WooCommerce','order_note',0,0),(7972,2480,'Virginia Mulhern','','','','2023-08-28 12:00:00','2023-08-28 12:00:00','I wish I had this book when starting engineering at UC Berkeley - the university gives you the process, but this book provide an invaluable context for so many concepts ... if you read the first few pages of each concept then you are ready for the university lecture and homework!  do not read cover to cover by check out the concept you are learning',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7973,2480,'Rama Rao','','','','2010-03-30 12:00:00','2010-03-30 12:00:00','This is an exhaustive review of the laws of physics as related to physical reality with significant emphasis on the mathematical component. The author is an outstanding mathematical physicist of our times, and in this book of 1100 pages, he describes the concept of space, time, and matter (energy) in terms of classical physics, quantum physics, string theory and its derivatives.<br><br>In physics, the behavior of objects is understood in terms of the action of a force; a vector quantity, which has both magnitude and direction. The force acts on a matter and produces a causative action that results in an effect. The cause - effect is one of the fundamental aspects of classical reality, but it gets fuzzy and uncertain at submicroscopic levels (quantum physical reality.) The main object of physical law is to describe the reality we observe. Our observation includes this universe that is made of space, time, matter, and energy. All objects are made of matter, which exists as complex structures composed of molecules, atoms and fundamental particles. Matter is also a form of energy and the two forms can interconvert as described by the Einstein\'s famous equation. The fundamental particles has certain physical properties and the manner in which energy (and force) is expressed is though their association with the so called force particles that are responsible for four fundamental forces that operate in nature, they are; electromagnetism, gravity, strong and weak nuclear forces. The four forces mediate matter-matter interaction and facilitate matter-energy conversions in spacetime and thus explain physical reality. The key to the understanding of nature and physical reality is to discover a theory that satisfactorily explains all the four forces and this theory must be experimentally verifiable. Unfortunately, this has not been achieved so far, but we have theories that can be verified but explains only three forces. One single physical theory that explains both quantum and classical realities have not been successful mainly because the nature of gravitational force (curved spacetime) is difficult to describe in a unified situation, since space and time at the most fundamental level are also quantized (exist in discrete quanta) and are they dynamic (not static background).<br><br>To understand this book the reader is required to have undergraduate level physics and mathematics; the author explains in the introductory part of the book why he chose to include mathematics despite its negative impact on the book\'s marketing potential. It would suffice to say that the interplay between mathematical ideas and physical behavior played an important aesthetic role in the minds of great physicists, and Albert Einstein is one of the most important figures in being attracted aesthetically to a particular idea. You can skip chapters 1-16, and from chapters 17-30, general discussion about geometry of spacetime, quantum physics, quantum field theory, quantum cosmology and the standard model of particle physics is presented. I found the last four chapters to be most interesting.<br><br>A brief summary is as follows: The unification of special relativity and quantum theory led to quantum field theory (QFT) which produced a minefield of infinities, but with some ingenuity, the infinity problem was circumvented leading to standard model of particle physics which is in good agreement with nature. The controversy between the quantum relativity group and the QFT side is that the latter group tries renormalizability or finiteness as the primary goal, but the former group likes to solve the conceptual difficulties between the two theories. The combination of two theories of particles physics into one framework to describe all interactions of subatomic particles, except due to gravity, is called standard model. These two theories are electroweak theory and quantum chromodynamics. They describe force interactions between particles in terms of exchange of intermediary particles. The author also engages the reader in an insightful discussion of many other theories.<br><br>1.&nbsp;\n  \nWhat Is Life?: with \"Mind and Matter\" and \"Autobiographical Sketches\"\n\n\n\n\n\n\n\n  \n  \n    <br>2.&nbsp;\n  \nQuantum Physics: Illusion or Reality? (Canto)\n\n\n\n\n\n\n\n  \n  \n    <br>3.&nbsp;\n  \nThe Emperor\'s New Mind: Concerning Computers, Minds, and the Laws of Physics (Popular Science)',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7974,2480,'Robert P.','','','','2023-07-14 12:00:00','2023-07-14 12:00:00','A book in great shape. Returning to it to. Deepen my knowledge.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7975,2480,'Palle E T Jorgensen','','','','2005-02-26 12:00:00','2005-02-26 12:00:00','It\'s a delicate balance for book: Encyclopedic  vs well focused on a unifying theme!<br><br>  Penrose succeeds admirably. It\'s not boring! Books like this are few and far between. Indeed, there are preciously few authors who manage to successfully guide beginning students into serious scientific topics; and even fewer who can see the big picture, and do it all. And then keeping our attention through more than 1000 pages! Penrose\'s book is inspiring, informative, exciting; and at the same time it\'s honest about what math and physics are. It is modest when modesty is called for. You are not cheated. You do get the equations (not just hand waving!), but you are gently prepared in advance, so you will want the mathematical formulae. Penrose\'s book is likely to help high school students getting started in science; and to inspire and inform us all. There is something for everyone: for the beginning student in math or in physics, for the educated layman/woman (perhaps the students\' parents), for graduate students, for teachers, for scientists, for researchers; and the list goes on.<br><br>It is one of the very few books of this scope that is not intimidating. Not in the least!<br><br>  I can\'t begin to do justice to this terrific book. Get it, and judge for yourself. I will also not give away the ending, other than saying that the title of the book is a good hint. And you will be able to form your own take, and your own ideas on the conclusion. Like with all good and subtle endings, they can be understood and appreciated at several levels.<br><br>  I came across Penrose\'s book in my bookstore by accident, and I was at first apprehensive: The more than 1000 pages, and the 3.3 pounds are enough to intimidate anyone. But when I started to read, I found myself unable to put it down. And I didn\'t: Bought it; and I had several days of enjoyable reading. I am not likely to put it away to collect dust either. It is the kind of book you will want to keep using, and to return to.<br><br>  It will not surprise that one of Penrose\'s unifying themes is the compelling and pleasing geometric images that underlie both the mathematics (roughly one third of the book: modern geometry, Riemann surfaces, complex functions, Fourier analysis, visions of infinity), and the physics: Cosmology (the big bang, black holes), gravity, thermodynamics, relativity (classical and modern: loop quantum gravity, twisters), and quantum theory (wave-particle duality, atomic spectra, coherence, measurements).<br><br>  The pictures: In fact, this semester, I was just teaching a graduate course, and I had a hard time presenting of Riemann surfaces in an attractive way. It\'s a subject that typically comes across as intimidating in many of the classical books: Take Herman Weyl\'s book, for example. I also found it refreshing to see that Roger Penrose gave the many illustrations his own personal and artistic touch; as opposed to having flashy pictures generated by the latest in color-graphics and special effects. I think readers will relate better to Penrose\'s own illustrations: They isolate and highlight the core ideas and they are not intimidating: We sense that we ourselves would have been able to make similar pencil sketches. Or at least we are encouraged to try!<br><br>  The common theme in the pictures serves to bring to life the underlying and fundamental ideas;--- another attractive feature of the book! It is otherwise easy to get lost in some of the equations, and in the encyclopedic panorama of topics.  Review by Palle Jorgensen, February 2005.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7976,2480,'Ian J. Miller','','','','2012-08-06 12:00:00','2012-08-06 12:00:00','With just under 1100 pages, this is no light-weight book, and the content matches. Penrose is an extremely capable mathematician with deep physical understanding, and it shows. It is not, however, suitable for readers with little mathematical or physical understanding. It is not a book for basic learning, but rather it seems directed at a very limited audience with sufficient background knowledge and for them it will take them far further. The book is designed to take people with advanced physical and mathematical knowledge up to Penrose\'s level of understanding. The first third of the book is effectively an introduction to advanced mathematics, and is interesting for this in its own right.<br><br>The book nominally takes the reader with no background information and fills this in, but I do not believe that is plausible. For example, consider the introduction to Maxwell\'s equations. These are introduced in Minkowski coordinates and expressed into a spacetime 2-form F, called the Minkowski field tensor, and a further space-time vector, with components expressed in matrix form that permit various symmetries to be perceived. I do not believe that anyone who had not at least vaguely become aware of this sort of approach would make much headway, but what follows is certainly elegant.<br><br>My biggest \"grumble\" with this book is the title: I believe \"The\" should be replaced with \"A\". The ancient Greeks founded two approaches to physics. Penrose adopts the Platonic approach, which considers mathematical forms, symmetries, and even beauty, and tries to fit reality to mathematical form. Thus towards the end, Penrose devotes a chapter to twistor theory, and in the end has to acknowledge that this is mathematically attractive, but it is difficult to take it anywhere in physics. The alternative approach, the Aristotelian approach, asks questions of nature and tries to find restrictions that lead to the correct theory. I should mention the caveat that I fall into the latter school, and with that warning, I believe that a true route to reality will involve many people working from both approaches.<br><br>Irrespective of certain reservations, I believe that anybody with some mathematical ability will gain some insights from this book (the more the ability, the more insights), and anybody interested in theory should at the very least read chapter 34, which gives Penrose\'s opinions on where the road will go, and the fashions encountered on it. This is a truly great piece of intellectual effort.<br><br>Ian J Miller, author of Elements of Theory',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7977,2480,'Dan','','','','2013-01-02 12:00:00','2013-01-02 12:00:00','The book gives a beautiful tour of \"fundamental physics\"; it is certainly not about all of Physics. It is an attempt to review the basic aspects of our current picture of the fundamental elements and laws of the reality, from which some understanding of the very small and the very large of the universe can be gained.<br>Who is this book NOT for: someone without some college level math background, OR someone without enough patience to spend months to slowly progress in learning the book\'s invaluable content.<br>Who is this book GREAT for: anyone with a college level math background. Students of science or engineering, in particular.<br>Who is this book PERFECT for: an udergrad student of Math or Physics, with some interest in theoretical physics. Graduate students or PhDs of those fields, will still certainly find the book indispensable, but will most probably wish they had read it earlier.<br>The first half of the book is a wonderful coverage of a nice selection of math topics, important for theoretical physics, and that with a good number of exercises, which combines with a clear and exciting narration to make it pedagogically fantastic! It indeed revived my deep interest in math after a long time. Among the topics in the first half are: algebra (groups and representations in particular), geometry (manifolds, differential forms, fiber bundles and connections in particular) and complex analysis (Cauchy\'s theorem, Riemann surfaces and Fourier decompositions in particular). A chapter on infinities, Turing machines and the Godel\'s theorem, beautifully ends the math lectures before starting the physics.<br>The physical discussions (starting with \"Spacetime\") are both pedagogical and bold: pedagogical because so much insight is conveyed through a very readable text. Bold, because the author dares expressing his sometimes unconventional views on the controversial topics.<br>In the second part, among the topics presented are: Quantum Mechanics, Quantum Field Theory, the Standard Model, early universe Cosmology, the Measurement problem, Superstrings and Loop Quantum Gravity; all these fascinating things and more you will learn from a brilliant thinker and expositor! What could be better?<br>In sum, for people interested in fundamental physics (or as the branches are often called, Mathematical Physics, High Energy Theoretical Physics, Particle Physics, Quantum Physics, and Cosmology), with a college level background in math (including Calculus), THERE IS NO ALTERNATIVE SINGLE BOOK FOR THIS HUMONGOUS AMOUNT OF KNOWLEDGE AND INSIGHT TO BE GAINED FROM!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7978,2480,'Zach Cox','','','','2005-05-27 12:00:00','2005-05-27 12:00:00','Did you ever play a game with yourself as a small child, \"I wish...\"  --- I did and I got very serious about it.  I very quickly progressed through the stages of wishing for a million dollars.  By the time I was a teenager I used to wish that I could understand everything in the universe.  By the time I was an undergraduate student in college I used to wish I could be arrested, put in jail for a few years and just catch up enough to do justice to the courses I was taking \"THAT\" semester.  By the time I was finishing up my graduate degree I used to wish I could get all the Mathematicians and Physicists in one room and force them to behave themselves and write some content that would give the rest of us a clue.  Since graduate school I have spent many many hours reading popular accounts of the latest \'bandwagon-theories\' of mathematics and physics and loving every bit of it.  My wish slowly evolved to the point where I wished I could stay aware and awake enough to appreciate the new stuff as it came out.  Well; folks like Roger Penrose in this book and Brian Green in his two books and even Robert Laughlin in his book about emergent phenomena have basically granted my wish.  I really fell in love with Brian Green\'s books and found myself constantly flipping to the back of the book and reading the end notes and saying to myself, \"Wow, wouldn\'t it be great if someone could sort of flesh all this out without requiring the reader to have a PhD in physics and math.\"  I read Roger Penrose\'s book The Emperor\'s New Mind some years ago and it only made me wish for more.  I can only applaud the Physicists and Mathematicians of our age for writing these types of books.  And I must say if you have even an undergraduate degree in math, physics, or any other physical science where you enjoyed the math and physics courses you took then this book is for you.  And even if you do NOT have a degree in math or some physical science but enjoy reading the best of the best then this book is for you.  I hope everyone will enjoy it as much as I have.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7979,2480,'Johnny Deep','','','','2022-09-24 12:00:00','2022-09-24 12:00:00','Found a glaring error in the first few pages:  \'something with a 3 at the top and an on the bottom\'.  It should be \'something with a 3 at the top and an 8 on the bottom\'.  Stuck out like a sore thumb and frankly, soured the reading experience.  How many more typos can I look forward to?  I bought the physical book many years ago, but wanted a more convenient form to read.  The kindle price was right so I\'ll keep it, but the proof reading is sub-par.  Disappointed.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7980,2480,'Dr. Richard G. Petty','','','','2006-07-02 12:00:00','2006-07-02 12:00:00','Having thoroughly enjoyed The Emperor\'s New Mind and Shadows of the Mind, I was looking forward to this book by Roger Penrose. I was initially slightly intimidated by the book when it arrived: it looked suspiciously like one of those textbooks that I\'d had to wade through years ago. But I need not have worried. The book is a model of clarity, and you do not need to be put off by the equations.<br><br>Roger Penrose is a member of a prodigiously talented family and a former collaborator of Stephen Hawking. He has a remarkable ability for explaining complex concepts, and his passion for his subject shines through.<br><br>I think that many people will be surprised at the amount of progress that has been made toward a comprehensive model of the physical universe. Penrose is extremely good at connecting the dots: showing how different areas of mathematics fit together. Just over twenty years ago I was asked to give a lecture about the brain and consciousness to a lay audience. During the question and answer session, I was asked something that set a group of us off in a new direction. \"Why,\" I was asked, \"Are these models complicated? Any true insights into the natural world should be simple enough for a child to understand.\" Is that really true, I wondered? Is it really possible to reduce the brain or the physical universe to a small number of ideas that could be explained in a high school textbook? The answer is, I think, no. And certainly on the evidence of Roger Penrose\'s book, the universe is multi-layered, and we need some sophistication to understand it.<br><br>This book does require intellectual effort, but it is well worth it. A bit of brain stretching is good for all of us! Unless you are a die hard math or physics buff, I recommend reading the book in small bite size chunks and contemplating what you have learned. That way it almost becomes a daily meditation. After a little while, you will probably find yourself looking forward to the next installment.<br><br>This is a book to which you want to return, and I think that it will be remembered as a classic long after many popular science books have been remaindered.<br><br>Highly recommended.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7981,2480,'Todd D. Vance','','','','2005-06-20 12:00:00','2005-06-20 12:00:00','It\'s a 1000 page book--I will update this review if I have signficant changes of opinion in the last 800 pages.<br><br>There is plenty of material accessible to those who have not studied college-level mathematics, but so far, not much percentagewise.  By that, I mean, there are lots of pages of material that doesn\'t go heavy into mathematcs, but there are more pages (in the first 200) that do.  Still, if you skip over the parts that are not interesting to you (or even scan them to get a flavor of what higher mathematics is without getting bogged down into details), there is plenty to read , especially at the very beginning which is a brief and fun-to-read history of attempts to come up with a theory of everything.<br><br>For those who have studied and have an interest in higher mathematcs, it has a good summary of much of college and some graduate-level mathematics, allowing one to review what they have forgotten, or get a flavor for subjects passed over--it may even inspire more in-depth study of some of these subjects (it inspired me to get out my old copy of Rudin\'s Real Analysis and read the chapter on Differential Forms, a topic not covered in the analysis classes I took).<br><br>In conclusion, it\'s a very extensive book that attempts to both explain the latest and greatest attempts at theories of everything, both (intuitively more than rigorously) mathematically and qualitatively.  I recommend it for a mathematician or one mathematically inclined who wants a review of mathematics or wants to learn some physics.  I also recommend it for anyone who wants to learn physics and doesn\'t mind that a lot of the pages will be heavily mathematical but (the author promises) not necessary to read to gain a lot from the book.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7982,2480,'avarma','','','','2015-07-10 12:00:00','2015-07-10 12:00:00','While this will not make you a mathematical wizard, it does try and explain calculus, complex numbers (and quaternoins) as well as a host of mathematical topics in laymen terms. Penrose does not stop there – he moves on to advanced topics such as Riemann Surfaces, Group theory (lie groups),  fiber bundles, twistor theory (to which Penrose contributed heavily ) and other advanced topics. He offers the reader the option of skipping the math and reading the physics applications of the math. For those interested in problem solving, interesting problems accompany most chapters. His treatment of complex number calculus and his chapter on Quantum Entanglement stand out as above par. If you ever struggled to understand the value of complex numbers or how they simplify actual problem solving, Penrose provides simple and elegant explanations. There is no doubt that a book of such grandiose breadth will attract critics, but overall, the book has more ‘goodies’ than negatives.  It is targeted towards a very large audience – from high school students (with some physics and calculus) to the advanced undergraduate student to the layperson with some mathematical exposure – looking to learn more.<br><br>While not an easy read, it is a great starting point for anyone looking to get back into physics  - by approaching it from the mathematical side (Penrose is actually a mathematical physicist  - he holds one of the most prestigious chairs in the world of mathematics). For those who are interested in the NEXT book after this one, I had compiled a list of similar \'self learning\' books :<br><br>http://www.anujvarma.com/self-learning-booksfor-advanced-physics/',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7983,2480,'Ulfilas','','','','2011-05-21 12:00:00','2011-05-21 12:00:00','Roger Penrose has penned a massive tome that takes on a pretty big job--that of addressing the physical laws that hold our universe together.  The equivalent of a B.S. in physics would seem to be the bare minimum required for the reader to make much sense of this book, with a Ph.D. in that discipline leaving the reader still less than completely prepared!  Of course the author himself freely admits that much remains that baffles him, including that apparently incomplete work known as quantum theory.<br><br>Nevertheless, many aspects of physics are explained in a way that at least seems not too difficult to understand.  On p.705 the author describes the Sun as Earth\'s entropy sink--with high energy photons absorbed by day--with many more low energy photons given off as that part of the Earth turns away from the Sun by night--and with the proliferating nocturnal low energy radiation quanta flows a large measure of entropy.  Meanwhile the entropy of black holes increase with the surface area of such objects--thus providing the entropy sinks of last resort for our universe.  So now I can at least begin to see how you can have a relatively well-ordered and life-bearing planet like Earth while still maintaining the monotonic increase in entropy within the closed system that is our universe.  This argument has stimulated me to imagine how a plant might accomplish its mission of alternating the population and depopulation of energy levels in such a way that the absorption of high energy photons and subsequent radiation of low energy photons allow that plant to achieve its own local reduction in entropy.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7984,2480,'Robert E. Miller','','','','2005-10-24 12:00:00','2005-10-24 12:00:00','I can\'t think of a more complete overview of modern physics, if one wished to obtain such an overview from a single book.  Certainly, Roger Penrose is well qualified to produce such a book.  It will take quite some time, I think, to make the most of the depth of information here.  As for the math? Well, that is the language of physics, and one must try to follow even the mathematical arguments as best one can.<br><br>My only criticism, which I guess is more on the order of a suggestion, is that this volume may have served better if presented in three more easily digested volumes.  First of these might be an overview of the nature of physical laws and introducing the math one needs to express and use these.  The second could build on that with a review and presentation of classical physics, while the third would go on to review modern theoretical physics, including quantum theory, string and membrane theory,  dark energy and dark matter, etc.  A review of the possibilities that emerge for a theory of everything might also then be included in a third volume.<br><br>Having said all of the above, the volume, as presented, does indeed belong on my bookshelf; however difficult transfer from shelf to brain may be.<br><br>Robert',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7985,2480,'iffish','','','','2022-02-04 12:00:00','2022-02-04 12:00:00','Even though putatively written for the lay-person, with relatively light math, I won\'t kid you:  this is currently pretty hard reading because it is a deep look at deep physics and associated math.<br><br>At the same time, I recommend it because it is inspiring me to work harder to upgrade my higher math knowledge and it really is invaluable if you seriously want to (as I think Einstein said) \"understand the mind of God\".',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7986,2480,'Ruben Rodriguez Abril','','','','2006-05-06 12:00:00','2006-05-06 12:00:00','First of all, I think that Mr. Penrose\'s book is not accesible to the average reader. I have no degree in Physics and I am an amateur Physicist, but despite of that I could understand very well the contents of the book.<br><br>If you want to buy this book I strongly recommend you to learn before the following subjects (preferibly using the marvelous book of Finn and Alonso): Newtonian mechanics, rudiments of vector calculus and matricial algebra (at undergraduate level), a little electromagnetism (Maxwells equations), and also a little special and general relativity (I recommend you in this subject the Stefan Waner\'s papers on the Net and the book of Bernard Schutz). It is also important to have a background in complex calculus, reading for example the book of Gillespie, which introduces you in the complex numbers world and also in notions like the Hilbert\'s space, that are central in Quantum Mechanics.<br><br>Once you have some ideas of the above mentioned subjects and once you are familiarised in reading physical equations, you will be able to read the book of Mr. Penrose.<br><br>On the other hand, I think that \"The Road to Reality\" is the best physics book I have ever read: Because it teaches you in great detail the newest theories of moderns physics and their mathematical fundaments. It makes you a real theorist physicist.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7987,2480,'Nick','','','','2019-01-31 12:00:00','2019-01-31 12:00:00','When you read a newspaper, you\'re going to understand 100% pretty easily, but of that roughly 95% will be fluff or filler. It is a rare exception when a newspaper article has more than one or two nuggets of actual \"value\", and even that value will likely expire easily within a weeks time. Contrast that with a book like The Road to Reality. There are very few people I think who could understand this book in its entirety, and to a reader on my level 50% may even be generous. But of those pieces which do make it through the haze, the density of value (such a subjective term) is on a scale so far removed from that of a newspaper that even one of Penrose\'s chapters could outweigh a years worth of daily study of the Times. Not only is the information content extraordinarily high, but what subject matter could possibly be more timeless and universal than the mathematics behind and the laws of the universe itself?',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7988,2480,'Jim Curry','','','','2005-04-15 12:00:00','2005-04-15 12:00:00','Isaac Newton seems to have been, generally, all ill tempered and and arrogant professor at Trinity College, Cambridge, University.  Despite those considerable shortcomings, he did produce absolutely top rate mathematics and physics.  His volume, Principia, not only reported the best thinking of the day, it remained the latest word, in some sense, on cutting edge mathematical physics until the abrupt transition from 1906 to 1926, when realtivity and quantum theory became credible.<br><br>This book is a gem.  The author seems to be a very decent person and not wildly arrogant.  While Cambridge and Trinity College, in particular, are certainly wonderful institutions, he comes from still a better one, namely Oxford.  It reports, in a non-trivial form, both a broad and a deep view of all the important mathematical physics of our day.  The literature is so voluminous, that this can only be thought of as an extremely intelligent and coherent summary.  There is a very complete and correct bibliography with notes to guide the reader to further study as necessary.  While this is unlikely to hold sway for centuries, as did the monumental book by Penrose\'s crusty precursor, it is certainly the Principia of the day and a treasure for everyone truly interested in any aspect of modern physics.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7989,2480,'J. MOLDOVAN','','','','2007-10-25 12:00:00','2007-10-25 12:00:00','Once again I need to remind potential readers that this is NOT a textbook or a reference work. It is written for the educated layman. It may have errors and omissions but these do not affect the net result. It is also not a coffee-table book, which can be picked up and browsed at leisure. Like all good works it takes effort to assimilate and repays the reader in heaps.<br><br>Some find the maths difficult. I can only say this: you will search far and wide before you find a book, which makes the mathematical foundations of the laws of nature as accessible as this. Penrose describes, explains and often illustrates all of the concepts he deals with in a singularly clear and accessible manner. His chapters on quantum mathematics and quantum physics should be published separately. They are a brilliant example of technical clarity.<br><br>Someone complained that if you don\'t understand calculus then you wouldn\'t be able to understand this book. Not quite correct! If you don\'t understand (a bit of) calculus then you won\'t be able to understand the laws of the Universe - with or without this book.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7990,2480,'Shamrock','','','','2015-02-16 12:00:00','2015-02-16 12:00:00','One of the best histories of anything physically important that I have ever read. I ordered it in paperback to use it but I\'ve now got a hardback copy as well. I did the same thing with the Feynman lectures. I mess up the paperback copies as I work with them and have the hardback copies for reference. A really great companion to these is Fundamentals of Physics (I bought the 8th extended edition) Jearl Walker (Halliday, Resnick and Walker). Dr. Walker now edits the book, I think. Penrose\'s The Road to Reality is well written and topics normally far from the understanding of most of us are well stated. Two years ago, this book alone started me on a journey that was only begun in 1965. The other books are essential to get at the rigor of solving problems. But Penrose tells you why it is important and how to approach the process of thinking.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7993,2480,'Debra Jones','','','','2015-04-22 12:00:00','2015-04-22 12:00:00','A nice book. Certainly not one to simply read through, it was a bit of work for me. I needed to brush up a bit on some math concepts as I progressed through it, but very rewarding in the end. I was a research  Microbiologist by trade, so most of the math I hadn\'t studied since University, (I\'ve been retired a while) so it was a good \"project\" for me. I would think that for someone not in the field, or not a Maths major, it might be a lot of (perhaps too much) work.<br><br>For the non-specialist I think it would still be an illuminating read. I thought it was a good overview of how we got where we are. Penrose can be a bit difficult for some, but worth the effort.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7994,2480,'Cblf','','','','2017-03-07 12:00:00','2017-03-07 12:00:00','This book further reinforces all of the concepts and ideas I\'ve learned over the years regarding physics and mathematics. I would not recommend this to someone who does not have a good fundamental basis in mathematics up to integral calculus. One of my favorite examples from the book is a simple one; a basic visual proof of the Pythagorean Theorem that appears in Chapter 1 I believe. I have only taken physics up to waves and optics so a lot of the concepts were new to me. I would recommend this to anyone who is curious about the universe and has the requisite mathematical knowledge to follow along.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7995,2480,'RSR','','','','2022-03-23 12:00:00','2022-03-23 12:00:00','An excellent book to training human mind on discovering the truth hidden behind the culturally imposed believes.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7996,2480,'RichardAlexanderGreen','','','','2020-03-05 12:00:00','2020-03-05 12:00:00','I spent 6 years studying math and physics in college. (I am not a PhD).<br>But, I have learned more about the \"deep thinking\" behind modern physics by studying the one book, then from all the other books combined. Penrose writes with that deep thinking in mind. While the book is 16 years old, it is still worth reading because it provides the historical, conceptual, and mathematical context behind existing \"Unified Theory\" efforts.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7997,2480,'Peter Reali','','','','2022-03-09 12:00:00','2022-03-09 12:00:00','The book arrived in the condition as described and I am very happy with the purchase.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7998,2480,'Eckehart','','','','2010-05-07 12:00:00','2010-05-07 12:00:00','Too many physics books are dry, dull and full of academic rigor like the \"classic\" series,  or simply overviews of some particular subjects that gloss over necessary math for a true understanding. I consider neither to be fun to read even I hold a PhD in physics.<br><br>This is one of those books that truly give you an inside look how an authentic mind works, how it perceives reality in terms of math, and how math and reality are constructed to be the one and the same, the physicists view that is, and it really touches on a deep philosophical level.<br><br>This is a book for anyone who truly loves physics, neither as a mechanical/academic training tool nor a pseudo/pop science kind trash(too many of them on the market) but a piece of real authentic work that\'s full of life.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(7999,2480,'Foothills','','','','2014-12-14 12:00:00','2014-12-14 12:00:00','There are many excellent reviews here, and because I\'m neither a mathematician nor a physicist there is little I can add. But for those like me who are smart, curious, and patient and who are wondering whether to have a go at this book, I say go for it. By the time you have labored your way to the end, you\'ll find that you have absorbed far more than you expected. When Penrose is not doing math, his voice and his prose are crystal clear. If Penrose loses you, sometimes taking a look at, say, the Wikipedia article on a particular subject will catch you up. If gaining a better understanding of physics is a longterm goal for you, then this book is a valuable reference.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8000,2480,'William A. Barrett','','','','2016-05-09 12:00:00','2016-05-09 12:00:00','Well, I have an advanced degree in physics and math from several decades ago.  I found I could follow about 10% of this opus, but continue to work on it anyway.  I\'m determined to catch up on what I\'ve been missing in physics, like how the standard model is justified.  Maybe should back up and study the Feinman lessons first, as a warmup.  Penrose is a genius, and does a great job of making these advanced ideas plausible to the general public, but you still have to have a good background in advanced math to follow his arguments.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8001,2480,'N. Coppedge','','','','2015-11-23 12:00:00','2015-11-23 12:00:00','I admit that I don\'t yet grasp much of the physics contained in this book.<br><br>A friend of mine has said that Penrose is \'good, but wrong\'. I\'m not sure, since I don\'t know the math perfectly.<br><br>Anyway, some of the philosophical questions raised in this book are highly interesting, for those interested in philosophy of mathematics and philosophy of physics.<br><br>This book is more math-intensive than you might expect from the title, although it is not a workbook.<br><br>It appears to be intended for those who know calculus who want a piece of literature to browse through.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8002,2480,'NoVA guy','','','','2019-04-11 12:00:00','2019-04-11 12:00:00','The author is kind, considerate, and writes in English prose (until the last chapter, when he starts to use pictures and a few equations).  That said, he\'s devastating to the theoretical physics community.  He (as a theoretical physicist himself) offers some kind suggestions for getting theoretical physics back in touch with experimental physics.  Good luck...',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8003,2480,'Zach','','','','2016-04-11 12:00:00','2016-04-11 12:00:00','Fantastic and intuitive intro. Frankly unless your devoted as hell, you have no chance if you\'re not a physics major or something similar. I have been reading this throughout my 3rd year in undergrad physics and I think some of the problems are pretty difficult. The first few hundred pages are all math, I\'m still reading through that. He gives a great intro to a huge number of topics and the problems he gives can give you intuition for an unexpected number of things.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8004,2480,'G. Barton','','','','2014-01-03 12:00:00','2014-01-03 12:00:00','After reading this, you realize the name should be \"The Road to Realities\" (plural). Not only does Penrose demonstrate the relativity of all things, but also the creation aspect inherent in choosing from an infinite number of possibilities on an infinite number of abstraction layers, each with a potential of spawning infinitely more if pursued. In the end, Penrose shows us how both, he created Spinors, and the universe as he knows it could not exist without them. Thus, he created the foundation of the universe? If there were only one reality, the answer would have to be yes.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8005,2480,'TwoMetreBill','','','','2019-11-29 12:00:00','2019-11-29 12:00:00','Not a light read like the Hawking books, aimed at the serious reader. Extremely comprehensive and up to date for 2004. Provides a solid grounding for the huge changes coming in Quantum Mechanics.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8006,2480,'Ronald Bailey','','','','2012-06-15 12:00:00','2012-06-15 12:00:00','Penrose presents an excellent challenge to the reader in this great book. Not only does it look thick before you start, but as you flip through it, you\'ll undoubtedly see symbols and equations you\'ve never heard of. Unlike most pop-sci books today, \"The Road to Reality\" was written for a more serious lay reader with real mathematical applications and theories. If you\'re looking for a book that will teach you something about the mathematics behind the modern scientific discoveries, you should get this book. 5 stars.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8007,2480,'Ralph E. Dratman','','','','2017-03-03 12:00:00','2017-03-03 12:00:00','This is a pretty amazing book. I\'m only a few chapters in, but it is filling in many gaps in my math education, mostly at an intuitive level. Better yet, it is just a sheer pleasure for me to read. Learning a lot while having fun? Not a bad way to spend my retirement.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8008,2480,'conyhz','','','','2020-09-25 12:00:00','2020-09-25 12:00:00','A good book for a college kid. Although it is hard to understand sometimes, she still likes it.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8009,2480,'HeWhoDeltIt','','','','2012-10-18 12:00:00','2012-10-18 12:00:00','This has got to be the best book about the modern understanding of physics and what led us to to it that I own. I purchased \"The Road to Reality\" used from this seller and it arrived to me on time and in perfect condition. I\'ve seen these books new in bookstores that were not in as good condition as the one I recieved from this seller. Five stars all the way around.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8010,2480,'I am falling in love with my life','','','','2015-07-02 12:00:00','2015-07-02 12:00:00','What laws govern our universe? Modern physics doesn\'t give a unified answer for this question, but only give partial answers. That is, we have two fundamental theories explaining our universe, relativity and quantum mechanics that conflict in some situations. There are theories like string theory which claims that it might be able to give a unified theory (as physicists say, the final theory). Among them is twistor theory formulated by the author, Roger Penrose in 1950s. As the inventor of twistor theory, he shows to readers how mankind has answered to the question from the ancient times until the present.<br><br>Several distinguished features of this book include:<br><br>1. more than 1000 pages with neither typos nor grammatical errors.<br><br>2. almost all major roads to final theory: string theory, loop variables, twistor theory, non-commutative geometry. For descriptions, the book deals with classical mechanics, relativity, quantum mechanics, and chaos theory from the basics. And also it deals with classical and modern mathematics: irrational numbers, Euclidean geometry, hyperbolic geometry, projective geometry, real number calculus, complex number calculus, Riemann surfaces, Fourier decomposition, generalized functions, Clifford algebra, Grassmann algebra, vector fields on manifolds, Riemannian geometry, exterior derivative, Lie groups, Lie algebras, connections, fibre bundle theory, Cantor\'s set theory, Minkowskian geometry, Lorentz geometry, sheaf theory, and tensors. But in spirit, this book is for general audience.<br><br>What is the most important for a reader? I think it is how much he learned from the reading. In this aspect, I could not give five stars. To finish the book, I spent almost two months. Of course, I learned a quite amount and it was a valuable time. But I think what I gained is just 35 percent of what the book contains. Comparing with Brian Green\'s popular books, the book is the next or the next-next level of a book. The difficulty was in concepts relating to relativity, in particular, tensors. In the book, the tensor notation is universal. Even the Maxwell equation is expressed in the tensor notation. I graduated in physics department and have a doctoral degree in mathematics. But I\'ve never studied general relativity and its related Lorenz and Minkowskian geometry, and tensor notations. And I\'ve never studied quantum field theory and its related tensor formalism as well.<br><br>If you think that the book is difficult for you also, I would like to give some tips. They are all related to skipping.<br><br>1. As the author says, skip equations and difficult parts if you don\'t want to read it sometimes the whole chapter. If you realize that the part is important to understand the main stream of the book, you can always go back to that part when necessary. At page 74, the author says,<br><br>My advice to such readers is basically just to read the words and not to bother too much about trying to understand the equations.<br><br>2. This book is not a textbook. If you want to learn relativity or tensor calculus or quantum physics, then you are referred to standard texts or Youtube lectures. You should not try to learn such subjects from this book. So when you meet some parts dealing with such a sophisticated level physics and think that it\'s too difficult, you should skip it without any regret.<br><br>3. As I said, in spirit, the book is for general audience. But if one can understand more than a half of the book, then I think that he would be at least a graduate student studying quantum field theory and relativity. If you are interested in the question, what laws govern our universe, you are entitled to read the book. But actually, if you are not already familiar with quantum mechanics at least at the level of popular science books, then it would be extremely hard for you to read. You have to make clever choices about what to read if you don\'t want to spend time frustrated.<br><br>4. Its style is informal and narrative, but in some parts, it is very dense. For example, the Newton mechanics is summarized only in three pages. After the section, the author assumes that you have mastered the Newton mechanics!<br><br>Now I want to share my detailed appreciation.<br><br>1. If your major is related to science, then among many curriculum subjects, the linear algebra would be the most helpful to read this book, such as, basis, eigenvalue, linear transformations and matrices, basis change, dimension of a vector space. And if you know what a phase space is for a dynamical system, then it would be very helpful (Search the Wiki). And if your major is mathematics, I have something more to say. I\'ve read the differential geometry book by O\'Neil, Calculus on Manifolds by Spivak and studied one-semester courses of differential topology and Riemannian geometry. So I am familiar with concepts like curvature, 1-form, integration on forms, exterior derivative, Poincare lemma. But that was not so helpful to understand relativity and tensors in the book. Everybody who is interested in the subject knows that they are related, but I think that they live somewhat in different area.<br><br>2. The book is so concise that sometimes you can\'t understand what the author says. For example, I think that the Mach-Zehnder interferometer at page 514 cannot be understood only by the explanations of the book if the reader does not already know it. And for many extremely important experiments including EPR-experiment, the book describes them so briefly that if you are not already familiar with them, you may have difficulty to understand them. And as for quantum entanglement, it is a really amazing phenomenon of quantum mechanics. But if you didn\'t already know it, then you may not fully understand it only with this book. As one more example of physics part, while I read the book, I come to know that there is a projective postulate in quantum mechanics that seems to be a very important issue in the book. But I couldn\'t understand it even though I tried to read the related parts several times. There are such things on the mathematical part. First of all, although there are explanations about tensors, if you are not already familiar with it, you would have a rare chance of understanding it. As the second instance, at the extremely interesting section on covariant derivative on a fibre bundle (Section 15.8), the explanation is not sufficient for actually calculating the example of A=ik the conjugate of z. As another instance, in the sections on complex numbers, we see some logically vague explanations. I found that the author didn\'t explain the fact that if two holomorphic functions on a domain D coincide on a continuous set (in a sense), then they coincide on the domain D.<br><br>3. There seem to be unsatisfactory explanations. At section 14.3, introducing covariant derivative, the author introduces the concept of parallel transport. But there is some ambiguity whether covariant derivative is derived from the parallel transport or the converse is true (this case is true in mathematical literature). And at section 21.4, it explains the Blackbody radiation. Wien\'s formula was already there giving insufficient interpretation of Blackbody radiation and several years after Wien, Planck succeeded in explaining Blackbody radiation with introducing his Planck constant. If so, it is absurd that the Planck constant appears in the Wien\'s formula.<br><br>4. If you are a mathematician, I strongly recommend that you read sections on analytic continuation, hyper-functions, Fourier decomposition, fibre bundles. They are worth reading in the aspect that the book explains to readers the geometric meaning. Once you read them, you will not forget it for a long time. For example, we know that a conformal map is an angle preserving map. The author says that a conformal map preserves shape locally. Maybe this is a common sense to many researchers, but to me it was an astonishing insight. There are many things like that in the book. And there are some differences of point of view to mathematicians like me. For example, in Chapter 5, the author explains complex numbers from the basics, and in Chapter 13, symmetry groups. I thought I knew them. But the way he describes them seems to be strange. As for complex numbers, I skipped some parts and made a decision to retain my understanding. As for symmetry groups, I thought I have to learn more.<br><br>5. Until the author introduces the generalized function, he asks us what function is. What definition of a function can be satisfactory in theoretical meaning and in practical applications? In fact, I used to ask the same question also, although I was not so explicit. I think anyone who studied mathematics for several years may have conceived the question. His argument is very interesting and really thought-provoking. More than that, he gives an explicit answer about the question.<br><br>6. Diagrammatic notations and conformal diagrams don\'t seem to be helpful for non-specialists.<br><br>7. While reading through the book, I hoped that I could understand the following sentence.<br><br>... according to modern physics, all physical interactions are governed by \'gauge connections\' which, technically, depend crucially on spaces having exact symmetries. (page 289)<br><br>But even now after finishing the book, I still don\'t understand what the above sentence means concretely. My future goal would be to understand it.<br><br>8. What are the merits of the book? Does the book have a merit that other books do not have? I think it has. The author has no hesitation in expressing his explicit opinion about major current theories.<br><br>Quantum field theory - mathematically inconsistent<br><br>Inflation cosmology - suspicious<br><br>String theory - Doubtful, especially due to its higher-dimensional spacetime. String theory regards spacetime as continuum but the author seems to believe that ultimately, spacetime also should be quantized.<br><br>Loop variables - At this stage, it is far from being quantum gravity theory.<br><br>Non-commutative geometry - The model does not incorporate special and general relativity.<br><br>Quantum group - There is no very clear relation between a quantum group and quantum theory.<br><br>Topological quantum field theory - It is hard to see them playing direct roles as models of serious physical theories.<br><br>Another merit of the book is that it gave me a motivation to study relativity, tensors, and quantum field theory by showing a big picture of modern attempts to final theory. I am a group theorist, and I want to meet more various groups in physics. And I am interested in the question: what laws govern our universe? This is the motivation that I chose the book. I hope that I learn more about the area. As remarked above, ultimately, the spacetime also seems that it should have a discrete property at extremely small scale. So some scientists suggested a discrete number system other than real numbers. I thought that\'s the right way! But the author suggests that rather than a discrete number system, complex number system would be the right number system. Now I think that it is possible that to describe a discrete object, we may use a continuum like the complex number system.<br><br>As a whole, the reading was valuable. While I read this book, I received the impression that the author is a very gentle, sincere, honest, kind, careful, and friendly person. Even though I was not totally satisfied with the book, I come to respect his attitude as a scholar.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8011,2480,'Arthur P. Smith','','','','2005-06-14 12:00:00','2005-06-14 12:00:00','A version of my review was published in the Huntsville (AL) Times.<br><br>For a book ostensibly about reality, this one talks a lot about \"magic\", \"mystery\", occasional \"miracles\", and especially the Platonic world of mathematics (or more generally, of \"truth\"), which Penrose forcefully argues has a reality all its own. Those who fear arithmetic may be lulled by Penrose\'s gentle preface, which goes into some detail on fractions. This introduces the important mathematical principle of equivalence classes; in the case of fractions, pairs of integers are declared equivalent in a simple way that leads to the normal rules of rational numbers.<br><br>But Penrose goes far beyond the simple in his discussion of the mathematical concepts underlying modern physics theories. Penrose\'s perspective on the mathematics relevant to reality is highly geometrical and visual, and even experts in the field might find new insights in his discussion of hyperbolic geometries, complex numbers (where lies much of the \"magic\"), and tensors and symmetry groups. Visual insight is difficult when one is talking about higher dimensional spaces, and the lack of visual geometric insight is one of Penrose\'s complaints about the 10 or more dimensions of typical string theories. Penrose provides startling new ways to look at the four dimensions most relevant to our spacetime, although occasionally his descriptions are marred by poor diagrams. Some of the sections also seem to be missing his unique touch, relying on more pedantic and traditional approaches to the math.<br><br>For the very reasonable list price this is really three books in one, and oddly organized for a book ostensibly directed at a lay audience. First is a textbook on the mathematics used by physical theories, complete with exercises. Penrose is careful to define almost everything so an intelligent lay reader could, in principle, follow, but the definitions are brief and not entirely self-contained, and many readers will lose hope fairly quickly. Second Penrose gives a semi-rigorous introduction to the fundamental theories of modern physics, including the remarkable successes of both General Relativity and the quantum field theor of the standard model of particle physics.  The real payoff is in the final portion of the book, chapters 27-34, which describes the vast gap that still remains between nature and our theories.<br><br>None of the other recent books along these lines - Hawking\'s<br><br>\"Brief History of Time\", Brian Greene\'s books, and other recent works by physicists touting our nearness to a \"theory of everything\" have approached anything like this level of detail.  In Penrose\'s view those other books are all at least partially wrong, and he believes the mathematics needs to be taken seriously to see why.<br><br>Penrose dives into this with an attack on inflationary (and other) theories of the big bang, linking the thermodynamic concept of \"entropy\" to the geometrical structure of the universe, where he is a renowned expert.  The fundamental issue, also discussed in Hawking\'s book, is why the universe has a definite \"arrow of time\", given that all our accepted physical theories are symmetrical when time is reversed. Somehow the universe started in a highly unusual low-entropy state; Penrose dismisses all the usual arguments about how this could have happened with a statistical analysis from his understanding of spacetime geometries. Did the universe really require a creator to specially select the astronomically low probability universe we started with, or are there physical processes we don\'t yet understand that introduce this sort of radical time-asymmetry in a natural way? Penrose favors the latter, but makes clear nobody has a good explanation.<br><br>The most substantive chapter in the book is Penrose\'s discussion of superstrings and related ideas. Some highly interesting mathematics has come out of these studies, but they may have little or no relation to the real world. Superstring theories have so far predicted essentially nothing that can be confirmed by experiment - Penrose explains why some often-touted cases of prediction (such as black hole entropy) are in fact rather dubious. Another part of Penrose\'s problem with them, as with the inflationary theories of the big bang, is that they are undergoing continual rapid evolution so that the superstrings of this year are very different from those of ten years back. Penrose gives a reasonably unbiased presentation of the theories and why people are interested in them, but he does not approve of the bandwagon status they have acquired.<br><br>Penrose admits at various points that his views on modern physical theories are somewhat out of the mainstream. His major contributions to physics have ranged widely, but predominantly within the realm of Einstein\'s \"General Relativity\", the theory of gravitation. Two of his unique contributions that have not been widely taken up by other physicists are mentioned repeatedly: his view that gravitation is more fundamental than quantum mechanics, and his \"twistor\" approach to spacetime geometry. The first of these implies that the basic notions of quantum physics may need to be modified with nonlinear terms arising from gravitational interactions within quantum superpositions. For both he identifies new experiments and theoretical work needed to make further progress, including a space-based \"Schrodinger\'s Cat\" experiment dubbed FELIX.<br><br>The fundamental thread through this book is this relationship between mathematical theories and the reality of nature. The Platonic world provides us with considerable \"magic\" to explore and be fascinated by, but do the magic and occasional miracles lead us to the truth about reality, or away from it? The reason mathematical truth is not quite the useless tautology Wittgenstein once argued is the linkage it provides between things we might have thought were distinct, but are in fact the same from a certain perspective, just as 3/6 and 1/2 are equivalent as fractions. Penrose illustrates numerous examples of the way mathematical equivalences can change one\'s perspective on the nature of the world around us - his \"twistors\" are yet another way of looking at the world, beautiful but quite different from our usual concepts of space and time.  Sometimes in the past a beautiful mathematical scheme, like that of the quaternions, has turned out to have  little practical use at all, despite much initial promise. Yet Einstein, Dirac, Feynman and others were led by mathematical considerations to theories that had real explanatory and predictive power. Penrose emphasizes the importance of real experiments to guide physical theories.<br><br>It seems we simply don\'t yet have enough experimental capability or mathematical understanding to find the true \"theory of everything\". It\'s possible we\'re close; if we are this book may help to make that happen. But even if we still have a long and winding road to follow, from Penrose\'s perspective there will be much that is fascinating and beautiful to observe along the way.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8012,2480,'Georges Melki','','','','2008-06-08 12:00:00','2008-06-08 12:00:00','This is definitely the most comprehensive book ever published on theoretical physics, written by one of the most influential theoretical physicists alive! But the reader should be forewarned : it is not easy reading, even if one skips the maths, as Penrose suggests in the Introduction...<br>Now, if one wants to understand everything, then it becomes really challenging, and I don\'t think many readers would be up to it. By understanding everything, I mean understanding enough to be able to do the exercises, and , believe me, this is no easy task! Especially that the author forgets most of the time that this is supposed to be a book for the \"general public\",so he writes as if he were giving a lecture to his graduate students.That is, he assumes that the reader knows already a lot about the subject at hand. Take, for instance, his explanation about the \"clock paradox\" of Special Relativity : not only is this explanation very special to Penrose, but he does not even explain what the \"paradox\" is all about! And so the reader who encounters it for the first time would tend to think that the paradox is only the fact that the voyager ages slower than the observer who stays behind, which is not altogether true...There are other examples showing Penrose not at his very best: the presentation of the Davisson-Germer experiment,at Chapter 21, leaves much to be desired, as it does not explain its true predictive property, that of interference fringes. And there is one place where Penrose talks utter nonsense: it is at pages 77, 78 and 79, on the issue of the sum of the series of general term x^2n. Penrose seems to believe, and this is astonishing, that this series is the development of f(x)= 1/(1-x^2) for all values of x. In fact, this is only true when the absolute value of x is strictly &lt; 1. In all other cases, the series diverges and has nothing to do with f(x)! The proof of what I am saying can be found in any elementary calculus textbook. So, with x= 2, we are bound to get a perfectly absurd value such as -1/3, because we are using a wrong expression for this series!Penrose goes on and on , pretending that Euler used to  \"hold to such absurdities\", which I don\'t believe at all,  and ending up by saying at page 79 that \" it is perfectly possible to give a mathematical sense to the answer \"-1/3\" to the above infinite series\", comparing this case to the \"logical absurdity\" of finding real solutions to the equation x^2 + 1= 0...I don\'t see the relevance of this equation to the subject at hand! Indeed, this equation has no real solutions, and it was only solved by the introduction of a new class of numbers, the complex numbers. But the infinite series of general term x^2n will always diverge to infinity when x &gt;= 1, and there is no way it can be made equal to -1/3 for x = 2, since we are only adding positive powers of 2 here! I honestly don\'t know what to make of all this nonsense, coming from a mathematician of the stature of Roger Penrose! I also wish these three pages could be removed from this book...Now, if Penrose can make such a blunder with an elementary subject like this one, who knows if he is really making sense for much more complex issues?This is why I have added \"to be read with care\" to my original title, and I have removed one star from the rating, when I went over my review on 4 April 2010...<br>The other aspect of the book that struck me is that Penrose distances himself from mainstream physics on two very important paradigms: spontaneous symmetry breaking in the early Universe, and inflationary cosmology. For him, there is no sufficient observational evidence for these two \"speculative theories\", as he calls them. Many cosmologists and physicists would surely disagree with him, but he has the honesty to express his beliefs, even when they are \"out of phase\" with those of other \"pundits\".And he has some very solid arguments, stemming from a deep insight into the Second Principle of Thermodynamics. It would be very interesting to see what the \"inflationists\" have to say about Penrose\'s arguments!<br>Another very significant fact is that Penrose does not show any sympathy whatsoever for Superstring Theory, preferring his own \"twistor\" approach to QFT. In this,  he joins other theoretical physicists, such as the Nobel laureate Sheldon Glashow, and lesser figures like Lee Smolin(see his book The Trouble with Physics) and Peter Woit(Not Even Wrong), who have been complaining about the non-falsifiability of SST for quite some time...Let\'s hope that the Large Hadron Collider at CERN will be able to settle this issue, one way or the other, in the near future.<br>But be that as it may, I would not hesitate to recommend this book to all  those readers who, like myself, are passionately looking for an explanation to the laws that govern \"Reality\", i.e the Universe we live in.<br><br>Finally, I would like to add here that \"Publishers Weekly\" makes a comparison between this book and Hawking\'s \"A Brief History of Time\". But this comparison is untenable: Hawking\'s small book is but child\'s play compared to this treatise!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8013,2480,'Dr. Lee D. Carlson','','','','2005-05-24 12:00:00','2005-05-24 12:00:00','The author of this book is well known to those who have studied general relativity and its quantization, his contributions to these areas going back to the 1960\'s. Indeed, the (black hole) singularity theorems and the invention of twistor theory are both credited to the author. The first of these is straightforward to learn from a mathematical standpoint, while the second can be very difficult to assimilate, as it is typically not motivated very well in the research literature. The author does discuss twistor theory in the book, but the discussion is not well motivated, and will be very disappointing to those readers who were expecting one that would be intuitively clear.<br><br>However, there are many places in the book where the author gives the reader special insight. Some of the these discussions include: 1. The discussion of the axiom of choice and the Banach-Tarski theorem, revealing the non-constructive nature of the latter, and also revealing the author\'s Platonism. Clearly the author does not favor a purely constructive approach to mathematics. Such an approach though would not only serve mathematics better but also its physical applications. Bizarre and counterintuitive results such as the Banach-Tarski theorem, incompleteness theorems, and non-computability results that arise from Cantor diagonalization would disappear, as they should, since they have no practical or observable consequences. 2. The treatment of complex numbers is thorough, but unfortunately the author has christened them as \"magical.\" This reinforces the view that complex numbers have some of special or mystical status in mathematics, which they do not. In addition, their use in physical applications is not mysterious either in spite of their not being used for such for 350 years after their invention in 1545. 3. The discussion on analytic continuation, which is presented in a way which will make the transition to sheaf theory much more palatable. Indeed the author describes the existence of complex smoothness in an open region in the complex plane as being equivalent to the existence of a power series expansion about any point in this region. Thus a holomorphic function is one which can be analytically continued about a sequence of points. The author refers to this as a `rigidity\' of holomorphicity, in that once a holomorphic function is fixed in its original region, and the path is fixed, the function can only be extended in one way. Real-analytic functions do not have this special property. 4. The discussion of quantum entanglement and quantum teleportation is very clear, with the only minus being that the author is too accepting of the reality of entanglement, and does not review critically the experimental evidence for this phenomena. A highly critical analysis of entanglement has not been done in the literature, even though such an analysis is sorely needed, due to the importance of entanglement as a mechanism to make quantum computation a reality. 5. The author mentions briefly an extension of the standard model that involves associating to each non-Abelian symmetry group a dual group, which is the same (abstract) group but will typically be broken. Most interestingly, this procedure results in a theory that only has three adjustable parameters, which definitely makes it reasonable to describe it as a significant advance in mathematical physics. 6. The chapter on the Big Bang and its \"thermodynamic legacy\" is the best in the book, for it addresses issues in a way that is both easily understandable and mathematically sound. The author presents the Big Bang as being \"extraordinarily special\" due to its low (relatively speaking) entropy. His discussion leads him into considerations of the anthropic principle, and he refreshingly recommends caution in giving this principle a religious interpretation. The author follows this by a fascinating discussion that reveals just how weak the anthropic principle is, and he once again expresses preference for naturalistic explanations on explaining the special nature of the Big Bang.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8014,2480,'James W. Picht','','','','2005-11-12 12:00:00','2005-11-12 12:00:00','I don\'t make a habit of discussing books I haven\'t finished reading, let alone reviewing them. I\'m breaking with habit because, first, I think I\'ve made a reasonable stab at getting into this book, and second, I\'ll probably die of old age somewhere around page 800 and want to have my say before then.<br><br>The dust jacket and various reviews assure us that this book is written for \"the serious lay reader.\" That depends on how we define \"serious\" and \"lay.\" For \"serious\" I might say \"insanely obsessive,\" and for \"lay,\" \"without a graduate degree in physics.\" Penrose claims that \"you can gain much from this book\" while skipping over the formulae. I suppose that depends on what he means by \"gain\" and \"much.\"<br><br>As I see it, this book is for the lay reader who studied and hasn\'t forgotten all he learned about calculus, linear algebra, and complex variables. Penrose lays out mathematical concepts in a clear and logical way, but I find that this text is detailed enough to remind me of things I once knew, not to teach me math I never had. His serious lay reader might have been trained as an engineer, but probably not as a lit. theorist.<br><br>Do I think the lit. theorist can gain much by reading this book? Not if reading means skipping over the formulae. The math in this book couldn\'t be relegated to an appendix; it\'s integral to the text. Let me repeat: I don\'t think this book could be re-written so that the mathematical formulae are in an appendix and remain a coherent explanation of physics. This isn\'t just Greene\'s Elegant Universe with a lot of mathematical explanation tacked on. The mathematical material is integral to understanding Penrose\'s explanations of physical theory and laws. (Okay, I\'ve skipped ahead to later chapters - I wanted to see if I could understand \"Quantum field theory\" (Ch. 26) just reading the words. Ha!) If you haven\'t studied the math, this book isn\'t the place to learn it, and if you can\'t understand the math, the physics makes no sense.<br><br>I did actually study a lot of math in college, but since I rarely use more than basic calculus these days, I\'ve gone aground on the shoals of Chapter 12, \"Manifolds of n dimensions\" (about page 225). Perhaps when I take a vacation I can pull down my math texts and get up to speed on this. I really am enjoying this book. It\'s a challenge and it\'s helping get some of the cobwebs out of the math regions of my brain. I like the illustrations, the notes are interesting and informative, and I think this book really can help a non-physicist understand (or at least have pretty solid delusions of understanding) the intellectual feast of modern physics. But let\'s be clear that the reader must have some degree of mathematical sophistication. It isn\'t for the mathematically innocent.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8015,2480,'P. Flaherty','','','','2019-06-17 12:00:00','2019-06-17 12:00:00','This is a very difficult book yet I\'m enjoying it.  I\'m well educated as I believe are many of the people here, half in languages, the other half computer science.  And have read a great deal in physics and math since leaving college - or, if you prefer, university.  The latter is an aggregation of the former but the distinction is mostly cultural.<br><br>Does Penrose explain everything needed?  No, of course not.  Other commenters refer to \"expensive\" secondary sources - I\'ve been able to remedy most of the holes I find with wikipedia pages and youtube videos.  He introduces the Cauchy-Riemann equations at a point without going into any depth.  I watched a youtube video and they seemed straightforward so when the book returned to the subject explaining it in detail, it was all familiar.<br><br>Why are holomorphic functions important?  Paragraph one alone of the relevant wikipedia page should tell you that.  Although based on stuff I\'ve learned over the yrs it\'s probably very non-rigorous but I thought: to the extent that analysis is tied to the calculus, and to the extent that what Penrose is dealing with here is complex analysis, it makes a whole more sense to deal first with functions that are smooth and differentiable - as opposed to functions that are not amenable to the calculus.  Put that way, seems obvious to me.<br><br>Read the book, if necessary, very slowly.  Wander around a while - a couple of hrs or days if you prefer.  Look some stuff up on the web - then return to the book.<br><br>I find that my brain will process the book differently on different occasions.  Sometimes I pick it up, it\'s not clicking, and I put it down again.  Then I return, hrs or a day or so later, and suddenly it makes sense again.  Go easy on yourself - there\'s no race to finish the book.  Savor it and appreciate on one occasion, feeling dense and then on the subsequent occasion feeling a nice shaft of light hitting your mind.  There are connections all over the place in this book and they make for a lovely landscape.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8016,2480,'ProgearStorm','','','','2017-07-01 12:00:00','2017-07-01 12:00:00','I\'ve gone through my \"getting bearings\" reading of this book, meaning a chapter a day just so I can get the trajectory of everything and maybe during my next read-through, which will be much slower, things will make sense. The first thing that has to be said is that this book definitely gives the reader a good perspective of the modern state of theoretical physics: though Penrose does take some positions which are controversial, such as his take on string theory (but then again touching the state of attempts at theories of everything is guaranteed to lead to controversy in the scientific sense), he shows deep knowledge and insight into physical problems and what barriers have to be overcome in order to reach our next physical revolution. He brings the reader through the perspectives of general relativity, quantum field theory, and thermodynamics, each time clearly making a case for what problems in each area need to be considered or explained by a unification of general relativity and quantum mechanics. This is no small accomplishment; I have not seen any books which have done nearly as good a job in putting all these things together as this one.<br><br>So why four stars instead of five? Check the title of this review. I have my bachelor\'s in math and physics (good school, poor student) and a large portion of this book looks like it will take a long time to digest, with the chapters on differential geometry looking like a few months of work and many secondary sources. Somebody without knowledge of those fields would have to treat the entire book that way. In short, the book is far less self-contained than it appears to be, and I would say less than the author thinks, as well. For example, in the second chapter he apologizes for having to use logarithms. This is in a book where, a dozen chapters later, we\'re taking the Lie derivative of tensors. Apologizing for using logarithms, yet somehow the reader is supposed to understand pseudo-Riemannian geometry a few hundred pages later. Either that\'s some sort of twisted joke or he really thinks that we can get it that quickly.<br><br>For all the complaining about the difficulty of some parts of this book, it\'s still a good one to pick up: even somebody who has to skip a great deal of the math could still learn a lot about the state of modern physics through the more qualitative descriptions of reality. Maybe after putting a bit more time into really reading closely I\'ll find that I was being too harsh on it all along, but we\'ll see in a few months.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8017,2480,'Robert Horn','','','','2011-02-04 12:00:00','2011-02-04 12:00:00','The mathematician in the title of this review is of course Newton, but Penrose has a similar claim, though being modest would probably be embarassed at the comparison. Other than their profound knowledge of Mathematics and its closely allied subject Physics, Newton and Penrose were both willing to peer into other areas of science and speculate. Trespassing outside of ones own scientific territory has its perils. Newton wandered into Alchemy and the Occult and Penrose has written on the function of the brain and now in this book has stepped into the great unknown before the Universe exploded in the Big Bang. As a communicator and teacher of advanced Physics Penrose is bettered in my opinion only by Richard Feynman, but where Penrose is extraordinary is in his courage in presenting revolutionary ideas in a world of aggressive and often very unpleasant academics who defend their turf with a vigour verging on mania.<br><br>He expects a lot from his reader but much of what he is trying to explain is not understandable outside of Mathematics and any attempt to explain his arguments using language is not just an oversimplification but may indeed be wrong. Many kinds of mathematical space other than our own three dimensions require some understanding of tensors to follow the reasoning. Quantum physics is based upon complex numbers. Penrose\'s earlier book The Road to Reality deals with all this in some detail and is understandable with a lot of effort even by non-mathematicians such as me.<br><br>Although marginal to the subject of this book I would have liked to hear more on his views on the cosmological constant that to applied scientists sounds embarassingly like a \'fudge factor\' designed to make theory fit facts. Another minor quibble is in the editing. Some sentences sound as if they were taken verbatim from a lecture (perhaps they were). An inevitable problem when a specialist is explaining a subject to a non-specialist editor is that obscurity isn\'t always because of the nature of the subject but may be because it is badly expressed in language. The spelling of the word discernible and a few other grammatical errors should be corrected in future editions, after all Penrose can\'t do everything...not quite.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8018,2480,'hamoon','','','','2012-06-08 12:00:00','2012-06-08 12:00:00','Upon my reading of the preface, I am apprehensive to Penrose\'s claims. I do not have faith that this book is suitable to a lay audience, even one with prior experience to calculus. I do not believe that his explanation of the rational number system sheds much light to readers without logical backgrounds, and I can only extrapolate that his prose will be similar to this. Maybe this book isn\'t for the lay reader, but that\'s a plus to me. It\'s better suited to me!<br><br>I did not enjoy the first three chapters. Here the book mainly focuses on philosophy. I hold my own opinions on the subject, but I am glad see it included for those readers who haven\'t thought about these topics.<br><br>Chapter 3 and 4 were interesting and even enlightening at some points. I now see how a slide rule works is actually very simple! Though the most important thing I learned (which I\'m a little embarrassed that I didn\'t learn this earlier) is that the exponential operation, say z\' is multivalued for arbitrary complex entries. I spent quite some time playing around with this and seeing where all the solutions lived in the complex plane (these spirals are quite pretty).<br><br>Here is something that I have been thinking about as well: Let clog denote what I will call the complex logarithm, and log the standard logarithm. The difference is how I interpret the input, as a real number or a complex number without an imaginary part. Recall then that<br>clog(z)=log(|z|)+i\'+i2\'k<br><br>and thus we immediately see that  clog(1)=i2\'k. This isn\'t difficult, but it is unintuitive*. A second example of interest is<br>ii=eiclog(i)=ei\'(i\'/2+i2\'k)=e\'\'/2e\'2\'k<br><br>If I ignore how I constructed these solutions (i.e. forget which k corresponds to the principal logarithm), I do not see which solution should be the \"intuitive\" solution, as they are all real! Penrose promises that the multivaluedness of these complex functions will become apparent later. Apart from winding, I\'m not sure how.<br><br>* Apparently unintuitive is not a word. Even Merriam-Webster was not able to help me find the correct wording!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8019,2480,'E. cohen','','','','2006-04-03 12:00:00','2006-04-03 12:00:00','While much of the book is a helpful summary of key topics in math and physics, the real value of this book is in the last few chapters. There Penrose describes in detail the fashionable theories of the day, namely string theory, super-symmetry and inflation from the perspective of someone who is has been immersed in advanced physics and made valuable contributions for half a century. Penrose points out the dearth of evidence  that actually support those huge investments of intellectual capital and compares them to other theories that also started out on the promise of mathematical beauty but were abandoned. He gives some space to his own twistor theory, which he has devoted so many decades to, in a way that shows great humility. The result is a fine testament to the devotion of so many great minds to understanding the universe.<br><br>I read this book to gain a sense of the state of the world of physics, and I was not disappointed. The most intriguing part was a section that mentioned some recent work by Witten in string theory that uses twistors to bring string theory back to our own world of 3+1 dimensions, and at the same time invokes supersymmetry only to remove an anomoly. Penrose had carefully shown how other approaches to remove anomolies had changed over time, so the implication to all the effort spent in supersymmetry is clear. Penrose nicely describes the difficulties this field poses to young physicists whose funding is decided by those with so many years invested in other theories. The Reality that this book is a Road to is the reality of the world of physicists more than of the universe.<br><br>This book is a refreshing change from other books which portray other approaches as the pinnacle of human development (see M-theory). I hope the approach taken in this book spreads and reduces the tendency to portray science has having everything understood but a few odds and ends. The chapters where Penrose pokes numerous holes in string theory and inflation were quite entertaining, and could serve as a model for more accurate portrayal of the world of science. This approach could encourage young people to feel they could make a contribution rather than just be saddled with patching up little corners of supposedly established dogma.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8020,2480,'E. Sackinger','','','','2019-10-30 12:00:00','2019-10-30 12:00:00','Whether you like a book or not depends a lot on your background. I have read much of this book twice. The first time around, I knew very little about the subjects in this book and was hoping to learn them from it. Once I got past chapter 9 or so, this became a rather frustrating experience. The chapters were simply too brief, too abstract, and offered too few examples to be a useful learning tool for me.<br><br>After learning much of the material covered in this book from other sources (see below), I have read some of the chapters again and I do like them now. They provide good summaries, additional insights, and interesting viewpoints IF you already understand the topics. A strong point of the book is its many illustrations.<br><br>In conclusion: If you are new to the subjects in this book, you are much better off reading Susskind’s “Theoretical Minimum” books and watching his many (free) videos. He is very good at explaining physics to someone with no or little prior knowledge. If you are already familiar with the topics of this book and are interested in hearing Penrose’s opinions and viewpoints, I do recommend this book.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8021,2480,'David McMahon','','','','2006-01-31 12:00:00','2006-01-31 12:00:00','Besides Lisa Randall\'s excellent book Warped Passages, \"The Road to Reality\" by Roger Penrose is currently THE book to get in popular physics. Although I have to admit when I got my copy I was in for a surprise. I had seen the high sales rankings and was expecting typical Penrose fair, instead what I found was an ambitious effort that could be akin to a principia for the masses. Penrose basically has the book divided into two parts. In part I, he takes us on a tour of mathematics, devoting a chapter to almost every branch of the field. There are chapters on calculus, complex variables, fourier analysis, group theory, you name it. I find his writing style kind of tough going, his explanations are clear enough but something about it has made me want to take this book in small chunks. This is the only reason I don\'t give the book 5 stars. Anyway, he doesn\'t hold back, not only writing a popular book that includes the equations but even assigning little homework problems! Moving on, the second half of the book is devoted to physics. Like the math presentation, Penrose devotes chapters to every topic in physics, so you\'ll find quantum mechanics, relativity, cosmology, black holes and string theory all here, presented in exquisite detail. In the end I think if you are interested in string theory, cosmology, quantum theory and the like, then you should get the book. Just plan on taking your time to read it.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8022,2480,'William O. Straub','','','','2005-04-27 12:00:00','2005-04-27 12:00:00','OK, so the book\'s not a reference text. Instead, it summarizes what every person should know about this wonderful universe we live in.<br><br>The book is remarkable for the number of topics it pursues and approachability of the mathematics it uses. It is not intimidating, but you\'ll need to make an effort to fully appreciate what the author has done. Penrose has thoughtfully prefaced his work with about 200 pages of mathematical review material that will be of little use to the specialist but of enormous help to everyone else. His writing style is both formal as well as witty, often humorous, and always enthusiastic. This is not a textbook, so there are no problems at the end of each chapter, but Penrose challenges the reader with numerous questions that appear as footnotes. This is a rather neat way to test readers as they make their way through this ponderous, but thoroughly enjoyable, book.<br><br>This book is primarily for readers who are keen on science and have some mathematical ability. But even those who find the math over their heads will benefit from Penrose\'s detailed narrative descriptions of quantum mechanics, general relativity, and the inner clockworks of our fantastic universe. If you don\'t intend to become a specialist, this book may be the only science book you\'ll ever need.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8023,2480,'Joseph Palazzo','','','','2005-06-15 12:00:00','2005-06-15 12:00:00','Although this is a very illuminating book (I gave it a 4-star rating), contrary to its claim in the preface, this is NOT for those whose math background is limited to a high school level. You need a firm grasp of advanced calculus, abstract modern algebra and topology to follow the brilliant logic of Roger Penrose in this enormous, encompassing work. If you do have this minimal background in math, this book will delight you. However there is one small criticism and that is on page 960 where Penrose dismisses Category Theory as \'abstract nonsense\'. What seemed to have escaped the brilliant man is that Category Theory has become the \'language\' of K-Theory, which the latter has become instrumental in the study of D-branes in String Theory. That Penrose fails to mention the very existence of K-theory in this book makes its sub-title, `A complete guide to the laws of the universe\', incomplete.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8024,2480,'M1keG','','','','2006-06-14 12:00:00','2006-06-14 12:00:00','This is an objective and thorough history and presentation of theoretical physics and was well worth the month or so it took me to read from cover to cover. If you are tired of fad physics, annoyed by being sold on pet theories, or the promise that a complete understanding of the universe is just around the corner then you will appreciate the honest and rational treatment that Penrose presents.<br><br>Caveat Emptor -- This is not for tourists. If it\'s been a while since you\'ve done serious math (or never) -- brush up! (or get comfortable with not understanding the details)  While the first third covers a lot of the relevant math before getting to the fun physics, it is not a math tutorial and the rest of the book assumes you get it.<br><br>Now, I just wish I could find an equally thorough and objective treatment of life sciences ...',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8025,2480,'Jesse Liberty<span class=\"a-icon a-profile-verified-badge\"><span class=\"a-profile-verified-text\"></span></span>','','','','2006-06-23 12:00:00','2006-06-23 12:00:00','The promise, at least in the early reviews (and in the introduction), is for a comprehensive treatment of the sweep of mathematics and physics written for the serious lay person. Penrose promises not only to make the necessary math accessible to the serious non-mathematician, he promises to reveal the beauty of the mathematics while exploring the interplay between the world of thought and the world of experiment.<br><br>I\'m afraid it isn\'t quite so. This is very tough going if you didn\'t get much past high school pre-calculus.  I\'m more-or-less sticking with it, but this is not easy; nor should it be, I suppose. but one could complain that Penrose promises an easier path than he can deliver.<br><br>On the other hand, I suppose if you regularly scale Mount Everest, then climbing Mount McKinley seems easy to you).',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8026,2480,'John G. Scott','','','','2015-03-18 12:00:00','2015-03-18 12:00:00','I\'m only about 100 pages into the book. So far, it\'s very interesting. My only complaint is that I don\'t find Professor Penrose\'s explanations of math very easy to follow. I\'m not a mathematician, although I had a pretty good background in calculus, and I\'ve never had any trouble with understanding math when it\'s clearly explained. For example, Penrose\'s explanation of complex numbers was a bit confusing at times. However, I read David Poole\'s appendix (in his Linear Algebra text) on the same subject and found it much easier to follow. This could be just a matter of personal learning style matching pedagogy, but Penrose, albeit undoubtedly brilliant, is not the best match for me as a teacher.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8027,2480,'G. Cantor','','','','2005-04-07 12:00:00','2005-04-07 12:00:00','Dr. Penrose has written an incredible tome outlining his primary research area spanning his entire professional life.  As a result, one can expect a detailed, penetrating analysis of some of the most difficult and interesting portions of physics.<br><br>I do wonder, however, about the intended audience.  Very few will actually be sufficiently prepared to understand much, if any, of the book.  Even many professional mathematicians will have difficulty unless their training includes considerable work in differential geometry and related areas.<br><br>As a result, I suspect that this book will join \"Gravitation\" by Thorne, Misner, and Wheeler, gathering dust on the shelf, as one of the least read physics books of our time.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8028,2480,'Arete','','','','2013-07-21 12:00:00','2013-07-21 12:00:00','If you want a book to add to your challenge reading library, this is it.  Great material, wonderful insight, but requires lots of thought, study, and review of college math.  Great for preventing Alzheimer\'s I would expect.  All joking aside,  the level of genius and comprehension that Dr. Penrose has acquired and his excellent writing skill in summarizing this information is tremendous.  Congratulations on this work.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8029,2480,'Wesley A. Ornick','','','','2014-07-05 12:00:00','2014-07-05 12:00:00','I almost couldnt read this -- very deep and hard to understand -- tiny choices and what really is going on all around us and the subtle or large changes your thoughts and actions can have on living and non living things you come in contact or thought with.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8030,2480,'CWS','','','','2013-03-16 12:00:00','2013-03-16 12:00:00','The book  is written in exhaustive techno speak . . . that would only be truly understood by his peers . . . Hence not understood by 99.9 percent of his audience that would likely want to have his book . . . like me.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8031,2480,'Patrick Reilly','','','','2015-03-09 12:00:00','2015-03-09 12:00:00','I think this book is very hard if attempting to be read cover to cover. It\'s better to read a few chapters, then use it as an encyclopedia of introductions - and for that, it\'s amazing.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8032,2480,'Barbara','','','','2016-12-27 12:00:00','2016-12-27 12:00:00','Great information, it got me to purchase math books to refresh my skills.  Long and difficult for a lay-person to grasp.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8033,2480,'Craig Levy','','','','2017-03-01 12:00:00','2017-03-01 12:00:00','Very comprehensive. If your math is rusty, forget about it. Otherwise you won\'t be able to put it down.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8034,2480,'James M. LeTellier','','','','2009-06-21 12:00:00','2009-06-21 12:00:00','Roger Penrose\'s \"The Road To Reality\" offers both the mathematically skilled and non- mathematicians great insight into the laws that govern the universe.  It is a wonderful reference text for the complex issues of physics from Plato to string theory and quantum gravity.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8035,2480,'samu1447','','','','2013-12-21 12:00:00','2013-12-21 12:00:00','Not the easiest of reads, but a real anchor to reality. You can also take a look at his earlier works.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8037,2480,'Pete Thomas','','','','2016-07-16 12:00:00','2016-07-16 12:00:00','difficult',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8039,2480,'Rachel Tortolini','','','','2008-06-08 12:00:00','2008-06-08 12:00:00','A book with this breath and sublty comes along a couple of times in a generation.  There have been Feynman\'s Lectures on Physics, Misner Thorne Wheeler Gravitation and others.  Penrose is a world class mathematician and physicist (but you already know that). I cannot begin to adequately review this book even handedly because his audience is really other stellar mathematical physicists which I certainly am not.<br><br>I had the requisite math background so I understood most of it from cover to cover. But I am under no illusion that I have mastered the material. I can say the content is superficial and tricks the lay reader into thinking he has mastered something when he has not.<br><br>We are talking about maths that are even beyond the Ph.D. level of mathematical physics here folks!  How can even Penrose condense tens of thousands of pages of textbooks that one routinely must grasp to get where he is with so much facility? The publisher must have thought (and Penrose rationalized) that they could sell more books if they touted that even a mathematically challenged reader could get something from it.  This is not the case.<br><br>True, I was thrilled at Penrose\'s intuitive grasp of difficult abstractions that had me puzzled from studying more pedestrian texts on these subjects.  Simply breathtaking.  I was a page turner from the get-go.  However I was under no illusions that I was learning something other than vaporware.<br><br>The most interesting idea that caught my eye was his critique of symmetry.  Animals have evolved to be pattern recognition machines.  Survival goes to the brain that can see the \"tiger burning bright in the forests of the night. Who has framed thy fearful symmetry?\"<br><br>Physicists and certainly mathematicians have been guided by a mystical belief that Nature must follow some beautiful elegant mathematical plan. What is the platonic world of ideas but the symmetry of our own evolved brain functions? -- Good for this time and place but not generalizable. It has worked so far but what if looking for symmetry is wrong. What if framing our equations in terms of groups is wrong.  What if Nature is chaotic, asymmetric, fractal?<br><br>Penrose entertains that the last 30 years has produced nothing which makes sense or is even observable.  Yet physicists blindly \'theory-on\' capivated by their presumptions.  The point is they have lost sight of the physics, the data, the observations.<br><br>As Firesign Theatre once said \"The People! Give them a light and they will follow it anywhere!\" Well, we know from history where this goes. Penrose suffers from his own criticisms and wants to create something like Einstein\'s elegant relativity applied to quantum gravity.  Who can blame him?  What is learning but man\'s vain search for God?<br><br>But what if QFT\'s incredible accuracy is only an accident like the resonance particles.  Feynman and others fudged enough to get the answers they were looking for even though QFT is not in principle normalizable. It is not even beautiful!<br><br>What if Einstein and unitary quantum mechanics was the last hurrah of this sort of elegance in our species?  Strings are beautiful but we will never know if the theory is observable.  I\'m afraid the measurement paradox is confusing what side of the experiment the measurement is taken.<br><br>It is consciousness and evolved brain structure that is the problem.  Penrose in other books has the (admittedly crack pot notion) that quantum gravity collapses the wavefunction and thereby creates consciousness.  But maybe he was looking in the right direction?<br><br>It is time to examine ourselves and our inherited prejudices as Nature is not only stranger (non-symmetric, anti commutative) than we suppose;  it is stranger than we can suppose (Arthur Eddington).  The future of physics and maths lies in understanding the limits of our own brains.  Maybe the largest symmetry group that exists (the \"Monster\" of 196K dimensions) is the symmetry group of the thinkers which discovered it.  And there are no groups bigger than this!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8040,2562,'Keith Dow','','','','2020-12-27 12:00:00','2020-12-27 12:00:00','This is a historical view of modern physics. It shows where the theories came from. It is an excellent read.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8041,2562,'GB','','','','2021-05-29 12:00:00','2021-05-29 12:00:00','An excellent book which should be in the bookcase of all physics students',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8042,2476,'Sundar Balaji. G','','','','2019-12-17 12:00:00','2019-12-17 12:00:00','Firstly, the packing was great. No damage.<br>DC Pandey is a great book to understand Physics.<br>You can use NCERT and DCP for concepts and then use HCV, Im sure you will become a master in HCV<br>Without doubts you can buy it.<br>My Best Wishes To Those Who Gonna Appear For The Competitive Exams.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8044,2476,'Koustub Poddar','','','','2020-02-13 12:00:00','2020-02-13 12:00:00','Just do the entire DC Pandey Series(Refer it for both theory and numericals, as it has really good theory and exhaustive numericals), NCERT at Your Fingertips by MTG, and 41 Years PYQ. Look no further for preparation of Physics!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8045,2476,'Tapan B Patel','','','','2021-07-13 12:00:00','2021-07-13 12:00:00','Good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8048,2476,'Lijin Richi John Shaji','','','','2019-07-07 12:00:00','2019-07-07 12:00:00','By solving these book getting more and more confidence<br>All levels of questions<br>More than one concept are included in some questions so make so interesting',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8050,2476,'Shashank','','','','2020-06-30 12:00:00','2020-06-30 12:00:00','Product was very helpful for jee and master in physics',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8051,2476,'Ravva Venkateshwar','','','','2020-02-09 12:00:00','2020-02-09 12:00:00','Very nice book with lots of examples and exercises.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8052,2476,'Atharv Gharge','','','','2020-05-26 12:00:00','2020-05-26 12:00:00','It\'s a very nice book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8054,2476,'SHASHANK RAI','','','','2019-07-29 12:00:00','2019-07-29 12:00:00','Very good book with topics described from basics to advanced level',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8055,2476,'shikha saha','','','','2019-07-28 12:00:00','2019-07-28 12:00:00','The book is very good but packaging is very poor .',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8056,2476,'Anjani prasanna','','','','2019-09-09 12:00:00','2019-09-09 12:00:00','Concepts explained very well it is helpful to jee',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8057,2476,'KARAMJIT KAUR','','','','2020-03-23 12:00:00','2020-03-23 12:00:00','Very good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8058,2476,'Vishwas','','','','2020-03-06 12:00:00','2020-03-06 12:00:00','Nice Book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8059,2476,'Manoj Kumar Gupta','','','','2019-10-14 12:00:00','2019-10-14 12:00:00','Best to clear concepts of optics',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8060,2476,'Amit Kumar','','','','2020-03-04 12:00:00','2020-03-04 12:00:00','Good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8061,2476,'Harshvardhansinh Jadeja','','','','2019-11-01 12:00:00','2019-11-01 12:00:00','It\'s good product',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8062,2476,'Bhagirathi verma','','','','2019-06-07 12:00:00','2019-06-07 12:00:00','Best book for neet and jee.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8063,2476,'S,Ranganath','','','','2019-08-21 12:00:00','2019-08-21 12:00:00','NYC book for JEE',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8064,2476,'Anil Kumar','','','','2019-10-27 12:00:00','2019-10-27 12:00:00','Nice book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8065,2476,'Dhananjai Kumar Sharma','','','','2019-10-26 12:00:00','2019-10-26 12:00:00','Good book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8066,2476,'Goutam G.','','','','2019-07-08 12:00:00','2019-07-08 12:00:00','Good book for JEE',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8067,2476,'c s wani','','','','2019-07-01 12:00:00','2019-07-01 12:00:00','Cheaper with market rate.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8068,2476,'Vibhor T.','','','','2019-11-09 12:00:00','2019-11-09 12:00:00','Nice',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8069,2476,'Aswathi','','','','2019-11-08 12:00:00','2019-11-08 12:00:00','Good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8070,2476,'Sarthak Tiwari suman','','','','2019-11-08 12:00:00','2019-11-08 12:00:00','Amazing',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8071,2476,'mangesh gurav','','','','2019-10-30 12:00:00','2019-10-30 12:00:00','Good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8072,2476,'Venkat','','','','2019-10-29 12:00:00','2019-10-29 12:00:00','Useful',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8073,2476,'G Venumadhavi','','','','2019-07-19 12:00:00','2019-07-19 12:00:00','Very nice book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8075,2476,'Sahil','','','','2019-09-28 12:00:00','2019-09-28 12:00:00','Owsam',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8076,2476,'Madhuban Sarkar','','','','2019-07-15 12:00:00','2019-07-15 12:00:00','Good book good condition',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8077,2476,'urmila waphare','','','','2019-08-04 12:00:00','2019-08-04 12:00:00','Nice',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8078,2476,'Patel sheshang ','','','','2019-05-30 12:00:00','2019-05-30 12:00:00','Nice content',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8079,2476,'Sunit Kumar','','','','2019-06-18 12:00:00','2019-06-18 12:00:00','♥️🔥',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8080,2476,'Naveen Asokumar','','','','2019-06-15 12:00:00','2019-06-15 12:00:00','Good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8082,2476,'RATTNA CHOPRA','','','','2019-10-03 12:00:00','2019-10-03 12:00:00','Very Good Book<br>Many compare it with Bm Sharma of Cengage<br>But it depends on u<br>Dc Pandey has less questions and theory but it tries to explain theory through questions like HC Verma<br>BM SHARMA is good as a standalone book<br>But solving it entirely is a tough job🙂<br>BUT i am deducting 1 star as it does not cover polarization in wave optics<br>Hope u find it helpful',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8083,2476,'yashwant','','','','2019-08-31 12:00:00','2019-08-31 12:00:00','The book is awesome for optics in her level. But in modern physics it doesn\'t have that much. You need your ncert books for that.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8084,2476,'Pradeep  kumar','','','','2019-06-18 12:00:00','2019-06-18 12:00:00','A great helpful book for IIT students. Very good and helpful explanation of each and every topic.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8085,2476,'Rahul','','','','2019-08-30 12:00:00','2019-08-30 12:00:00','Cover of the book is tear from one side',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8086,2476,'Anmol','','','','2019-10-28 12:00:00','2019-10-28 12:00:00','Not for NEET',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8087,2476,'Umesh Kumar Verma','','','','2019-09-21 12:00:00','2019-09-21 12:00:00','Good book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8088,2476,'surendranadhyarra','','','','2019-08-14 12:00:00','2019-08-14 12:00:00','Numericlas good',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8089,2550,'Bhim Prasad Upadhyaya','','','','2022-02-12 12:00:00','2022-02-12 12:00:00','I am giving it a five star because I feel like reading the book. Well explained, high quality printing, and many problems in each chapter. I had Advanced Level Physics book  by Michael Nelkon and Philip Parker<br>for my 11th and 12th grade physics. While the writing is/was good and concise, the printing quality was really poor. I literally got headache while reading the book because of faded ink and small fonts. What a worse situation to learn one of the most interesting subjects of modern time education. I wish my university had \"University Physics with Modern Physics\" as a text book instead.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8091,2550,'Christine','','','','2022-09-10 12:00:00','2022-09-10 12:00:00','This book is helpful for my Physics class. Book\'s condition does really like new.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8092,2550,'fleur','','','','2022-01-22 12:00:00','2022-01-22 12:00:00','The book arrived before the expected data, and in perfect condition. Excellent service. Thank you!',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8093,2550,'Buyer','','','','2021-10-16 12:00:00','2021-10-16 12:00:00','Book was in good shape.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8095,2550,'Alex','','','','2021-05-08 12:00:00','2021-05-08 12:00:00','Perf condition. Everything a Physics Student would need',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8096,2550,'T. Buster','','','','2021-07-29 12:00:00','2021-07-29 12:00:00','Thank you',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8097,2550,'susan walpole','','','','2020-11-26 12:00:00','2020-11-26 12:00:00','It was cheaper to buy this then rent it believe it or not.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8098,2550,'Erik Arredondo','','','','2020-10-01 12:00:00','2020-10-01 12:00:00','Book is long but a good read',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8100,2550,'John Mowris','','','','2019-09-01 12:00:00','2019-09-01 12:00:00','This is a huge book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8101,2550,'Carol Niec','','','','2020-12-13 12:00:00','2020-12-13 12:00:00','Is the type in the loose leaf version any bigger? Small type is a problem for me.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8102,2550,'John batchler','','','','2020-05-10 12:00:00','2020-05-10 12:00:00','Not like the edition which prepared u to do research this addition gives u clues and hints to solve problems',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8103,2550,'Alex P.','','','','2023-05-07 12:00:00','2023-05-07 12:00:00','Libro clásico que no debe faltar en la biblioteca de cualquier profesor de Física.',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8104,2550,'Amrutanshu Dash','','','','2022-11-29 12:00:00','2022-11-29 12:00:00','Awesome content and printing quality<br>I am quite impressed',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8105,2550,'suresha','','','','2022-06-07 12:00:00','2022-06-07 12:00:00','This is Indian version textbook and hence is black and white, not coloured. Thickness of page isn\'t too good nor bad but usable. Has all the topics written in a great way while mentioning real life examples for better memorizing and understanding',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8106,2550,'Adrish bhunia','','','','2022-11-05 12:00:00','2022-11-05 12:00:00','Excellent book for physics',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8108,2550,'spandan som','','','','2022-09-29 12:00:00','2022-09-29 12:00:00','Best',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8109,2550,'Rajeev Gupta','','','','2022-03-31 12:00:00','2022-03-31 12:00:00','This Books is known For Theory<br>No Book can explain a Topic in such an easy and interesting way from basic to University level<br>Best Book for Concept<br>This Books Tells us the true meaning of Concept',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8110,2550,'Shaswata Pal','','','','2022-08-19 12:00:00','2022-08-19 12:00:00','Best ever, exceptional concept clearing book',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8111,2550,'Robin d\'Erlanger','','','','2021-06-07 12:00:00','2021-06-07 12:00:00','I purchased this 15th edition kindle version as an update to the excellent previous edition, but the diagrams/figures seem to be missing so I returned it for refund.<br><br>Since returning it the problem seems to have been fixed and I have re-purchased it and opened it in the Kindle app for Windows - all diagrams/figures now available - excellent',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8112,2550,'Aji','','','','2022-03-24 12:00:00','2022-03-24 12:00:00','Good for using as a introductory book and for clearing basic concepts',0,'1','Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)','review',0,0),(8113,2550,'M Someswara Rao','','','','2021-12-17 12:00:00','2021-12-17 12:00:00','This is a good book for 11th and 12th class physics students. 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