Apparently, this user prefers to keep an air of mystery about them.
7 Interesting math-facts that are visually attractive sep 12 '13
6 Why can't you square both sides of an equation? nov 16 '13
2 What's the probability that Abe will win? oct 4 '12
2 Why don't we include $\pm\infty$ in $\mathbb R$? jun 9 '13