Apparently, this user prefers to keep an air of mystery about them.
3 An equivalent definition of open functions apr 17 '13
3 How to prove that End(R) is isomorphic to R? may 24 '13
3 Is there a counter example? sep 22 '13
1 Triangular rings with direct sums apr 21 '13
1 How to show that if every cyclic left $R$-module is projective implies that for any left ideal $U$ of $R$, the left $R$-module $R/U$ is projective? apr 23 '13
0 The inf and sup of sets [duplicate] may 12 '13