I'm a first year grad at University of Waterloo.
6 Prove that semi-simple rings are Dedekind-finite may 22 '13
4 Rank of projective module defined as the smallest $n$ such that $P$ is a direct summand of $R^n$ oct 11
3 If $H$ is a Hilbert space, does the coordinate projection $\pi :H\oplus H\rightarrow H$ take closed subspaces to closed subspaces? apr 6