Apparently, this user prefers to keep an air of mystery about them.
8 Prove $\sim$ is an equivalence relation: $x \sim y$ if and only if $y = 3^kx$, where $k$ is a real number Apr 3 '11
3 how can i show that £ is a topology on a set X? Apr 3 '11
0 Stabilizers in SL(2,Z) Apr 3 '11