I took Mary Boas' course in mathematical physics at De Paul in the late 50s. Her lectures were excellent and I learned all the math I needed as a physics major. This book is an outgrowth of her lectures, very clearly written and very comprehensive. It is intended to teach physicists how to do physics, not to teach mathematicians how to do math. In other words it is heavy on physical applications and lighter on mathematical axioms and theorems.<br>I still use this book (I own the 2nd edition) whenever I need to refresh my knowledge of any topic in mathematical physics.<br>Warren Wolfe