Your favorite math reference book(s)?

[SlideRule]

(12-28-2017 06:10 PM)Maximilian Hohmann Wrote:  … required to buy Bronstein/Semendjajew: Taschenbuch der Mathematik (= Handbook of Mathematics). Don't know if an English translation exists…

YES, try Handbook of Mathematics 6e (Authors: Bronshtein, I.N., Semendyayev, K.A., Musiol, G., Mühlig, H.) ISBN 978-3-662-46221-8
from the URL
This guide book to mathematics contains in handbook form the fundamental working knowledge of mathematics which is needed as an everyday guide for working scientists and engineers, as well as for students. Easy to understand, and convenient to use, this guide book gives concisely the information necessary to evaluate most problems which occur in concrete applications. In the newer editions emphasis was laid on those fields of mathematics that became more important for the formulation and modeling of technical and natural processes, namely Numerical Mathematics, Probability Theory and Statistics, as well as Information Processing. Besides many enhancements and new paragraphs, new sections on Geometric and Coordinate Transformations, Quaternions and Applications, and Lie Groups and Lie Algebras were added for the sixth edition.

BEST!
SlideRule

ps: have both