Apparently, this user prefers to keep an air of mystery about them.
31 Sum of factors of a huge number. Dec 24 '15
26 Is there a name for this type of polygon? Dec 6 '15
7 What is closed-form expression for $F(n)$ when $F(n)=F(n-1)+F(n-2)$ and $F(0)=a$,$F(1)=b$ and $a,b>0$? Feb 21 '13
5 Prove that any two left cosets $aH, bH$ either coincide or are disjoint, and prove Lagrange's theorem Dec 31 '12