I'm a grad student at University of Waterloo, studying ring theory.
6 Prove that semi-simple rings are Dedekind-finite May 22 '13
5 Rank of projective module defined as the smallest $n$ such that $P$ is a direct summand of $R^n$ Oct 11 '14
4 Nontrivial examples of pro-$p$ groups Dec 1 '14
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 '15