Apparently, this user prefers to keep an air of mystery about them.
4 Let $G$ be a finite simple group such that $|G|=60$. Find a subgroup $H\leq G$ satisfying $|G:H|=5$ Oct 13 '12
3 Finding locally regular sets Nov 15 '12
2 Symmetric Difference as a Metric Oct 4 '12
1 Normalized Cuts and Spectra Dec 10 '12