Beta Math Handbook

If you're involved in any aspect of applied mathematics, this book is worth its weight in gold. It is probably considered somewhat obscure in the US, since it's a Swedish book that isn't really marketed outside of Sweden, but I haven't seen anything as comprehensive anywhere. The book contains all the formulae, theorems and tables that any student or professional involved with mathematics or engineering could hope for. It assumes that the reader has a level of understanding equal to "I've taken the course, but forgotten the details".It is comparable to the more well-known "Mathematical Handbook" by Spiegel, but in my opinion much better. The coverage of the areas that Spiegel cover is equal or better. "Beta" also covers probability theory, random processes, numerical methods, simulation, and other areas that are used extensively in practice but not even mentioned by Spiegel.In my opinion, if you are only going to buy one mathematical reference book, "Beta" is an excellent choice.

I have found Beta Mathematics Handbook to be the most organized, informative, concise and well-written reference for mathematics of all levels, esp. for probabilities and statistics. I highly recommend it. A must in every mathematician's bookshelf.