Electromagnetic Field Theory: A Problem Solving Approach | Electrical Engineering and Computer Science | MIT OpenCourseWare recommended by X/karatalaamalaka
Linear Algebra by Shilov (PDF) via X/akbirthko
Applied Mathematical Programming; This book is a reference book for 15.053, Optimization Methods in Business Analytics, taught at MIT. This is from 1977. I suppose it’s ok for fundamentals but you can probably do better going with a modern text like “Model Building in Mathematical Programming by H. Paul Williams “. MIP formulations and linearizations ( PDF ). Convex Optimization – Boyd and Vandenberghe