Lifting subgroups of ${\mathrm{PSL}}_2$ to ${\mathrm{SL}}_2$ over local fields

Naomi Andrew, Matthew J. Conder, Ari Markowitz +1

Let $K$ be a non-archimedean local field. We show that discrete subgroups without 2-torsion in ${\mathrm{PSL}}_2(K)$ can always be lifted to ${\mathrm{SL}}_2(K)$, and provide examples…