Apparently, this user prefers to keep an air of mystery about them.
13 Interpretation of $\epsilon$-$\delta$ limit definition Jul 24 '13
3 What is the area of a pixellated surface? Apr 4 '13
3 Probability distribution (I'm pretty sure it's higher than high school math, but I don't know how hard it is) Apr 3 '12
3 Solve the general cubic by factoring Jun 8 '12