Apparently, this user prefers to keep an air of mystery about them.
19 How to solve $x^3=-1$? sep 8 '12
13 How to show that $f(x)=x^2$ is continuous at $x=1$? oct 8 '12
5 How to show that e.g. $\cos(z)$ is analytic using Cauchy- Riemann differential equations? aug 18 '12
4 What is the role of Topology in mathematics? oct 5 '12