Apparently, this user prefers to keep an air of mystery about them.
4 Let n be an even number and d be divisor of n/2. Then prove there is a number $1\leq t\leq n$ such that $(t,n)=1$ and $(n,t-1)=2d$. dec 17 '12
4 An automorphism on generating set of a group feb 7 '14
3 On automorphisms of finite abelian group feb 7 '14
3 Let n>30. Then prove there exists a natural number $ 1< m\leq n$ such that $(n,m)=1$ and $m$ is not prime. nov 27 '12
2 on two decompositions of a finite group $G$ nov 22 '13
2 On the number of Hall divisors of an integer may 8 '14
2 on a set of numbers with special property may 10 '14