Endotrivial Modules for the General Linear Group in a Nondefining Characteristic

Jon F. Carlson, Nadia Mazza, Daniel K. Nakano

Suppose that $G$ is a finite group such that $\mathrm{SL}(n,q)\subseteq G\subseteq \mathrm{GL}(n,q)$, and that $Z$ is a central subgroup of $G$. Let $T(G/Z)$ be the ab…