On the modular cohomology of $G{L}_2(\mathbb{Z}/p^n)$ and $S{L}_2(\mathbb{Z}/p^n)$

Anja Meyer

Let $p$ be an odd prime. Denote a Sylow $p$-subgroup of $G{L}_2(\mathbb{Z}/p^n)$ and $S{L}_2(\mathbb{Z}/p^n)$ by $S_p(n,GL)$ and $S_p(n,SL)$ respectively. The theory of stable elements…