June 14th, 2012, 9:13 am
This book by Mary Boas is extremely popular with physicists:Mathematical Methods in the Physical SciencesIt's an undergrad book, but quite a few PhD physicists (including me) check it regularly. I don't think it has any stochastic calculus, which is an obvious problem for quant education.For Ito/Stratonovich calculus, I like these:Oksendal's book is a common standardSteele's book is full of pure math and gambler's intuition Chirikjian's book focuses on multivariable problems