Um... yes, it's even more important in math B to be able to have, at your fingertips, all the theorems related to Ideals, Rings, Groups, Categories, Topologies,

Um... yes, it's even more important in math B to be able to have, at your fingertips, all the theorems related to Ideals, Rings, Groups, Categories, Topologies, etc. This is why I re-read my math textbooks from time to time. You always miss some theorems, and they're often key to higher-level understanding.