There are a few books which admirably explain the assumptions etc. - A Programmers Introduction to Mathematics (amazing for building intuition, explaining how

There are a few books which admirably explain the assumptions etc. - A Programmers Introduction to Mathematics (amazing for building intuition, explaining how to read mathematics papers, understanding beauty of proofs etc.) - Elements of Mathematics for Economics and Finance (a quick jog through typical the high school and college math a non-mathematician would study) - Papula's Mathematik für Ingenieure und Naturwissenschaftler (rigorous (for practitioners) and comprehensive. Starts from nothing, with sets, then teaches you fractions, then quadratic equations until you're doing vector analysis and Laplace transformations) - Foundations and Fundamental Concepts of Mathematics by Howard Eves (wide overview of the man developments in mathematics, up to its publication)