I am interested in self teaching myself some subjects. I need
1) Linear Algebra /Matrix math
2) Differential Equations
3) Abstract Algebra
I've already done some work and dabbled in all of these, but I need a firm grounding, and books that will give that. Since I'm self-teaching, a big plus one for any books attached to free online courses. Also a good calc review/reference book would also be good if you know one.
Thanks any input!