Comment Graph Theory (Score 1) 1203
Why hasn't anyone mentioned graph theory yet? I'm A CS major, math minor, and of all the math courses I've taken (Calc,2,3, Linear Algebra, graph theory, abstract algebra, probability theory), graph theory has definitely been the most useful in CS. Graph algorithms are a HUGE area of research, and come up in practice all the time. A good foundation in the thoery helps enormously.
