This book on Quantum Mechanics I consider tot be a good introduction to the subject matter. due to the focus on two-spin particles iT present a coherent picture.<br>A few remarks :<br>Exercise 4.5 an arrow on top of sigma is missing.<br>Page 136 " a wave function can represent a state vector" . Proof?<br>Page 150: an unusual notation for Alice's brackets. Do not confuse them with Poisson brackets.<br>Page 176: "But for Alice and Bob, it is easy to se that every component of sigma commutes with every component of tau". Every component?<br>Page 181: Exercise 6.9. Their eigenvalues of twee eigenvectors? "......., and the triplets are all eigenvectors with a different degenerate eigenvalue". Does this comply wit the defenition on page 64 and 67? Exercise 6.10: an Hamiltonian without Planck's constant?<br>Page 185: Footnote 1 the indices just the otherway around.<br>Exercise 7.3 third bullet point 4*1.<br>Equation (7.13) capital L lefthandside : bold.<br>Page 200 wave function written with capital psi: confusing. This also holes for the pages thereafter.<br>Page 201 "....them iT acts trivially .......". Is that easily understood? It is explained on Page 204.<br>Page 254: dx is missing in the integral.<br>Page 256: bottom of the page "eigenvector" of eigenfunction.<br>Page 257: " Normalizing......... Is a more subtiel operation....."? How subtle?<br>Page 261 Capital P has been used as the momentumoperator. Confusing. See Page 263.<br>Page 276 the partial differentiation is incomplete.<br>Pagpe 284 Text below (9.5) should read eigenfunctions in stad of eigenvectors.<br>Page 307. Bottom of the  page epsilon in stead of e.<br>Page 327. Normalization factor of the ground state function equals 1?<br>Leen Noordzij