Group actions on contractible $2$-complexes II

Kevin Ivan Piterman, Iván Sadofschi Costa

In this second part we prove that, if $G$ is one of the groups ${\mathrm{PSL}}_2(q)$ with $q>5$ and $q\equiv 5(\mathrm{mod}24)$ or $q\equiv 13(\mathrm{mod}24)$, then the fundamental group of eve…