Apparently, this user prefers to keep an air of mystery about them.
10 Maximal ideals in $R[x]$ Aug 14 '12
2 Let $M$ be a maximal ideal in $R$ such that for all $x\in M$, $x+1$ is a unit. Show that $R$ is a local ring with maximal ideal $M$ Aug 10 '12
1 Matrix norms and spectral radius Sep 14 '12