Apparently, this user prefers to keep an air of mystery about them.
17 Exciting games and material to motivate children to math oct 19 '11
13 Sum of derivatives of a polynomial dec 4 '11
3 Minimizing maximum absolute column sum norm of the residual between a matrix and its $k$-rank approximation oct 20 '12
0 $l_1$ distance of a point to a convex polygon jun 9 '12