Apparently, this user prefers to keep an air of mystery about them.
4 If p is prime and p|$a^n$ prove that $p^n|a^n$ sep 24 '13
1 1) Suppose $g \circ f$ is one-to-one. Prove that $f$ is one to one. Does $g$ have to be also one-to-one? jun 25 '13
1 Prove that $d^n(x^n)/dx^n = n!$ by induction jun 25 '13