Universal deformation rings for the symmetric group S_5 and one of its double covers

Frauke M. Bleher, Jennifer B. Froelich

Let $S_5$ denote the symmetric group on 5 letters, and let ${\hat{S}}_5$ denote a non-trivial double cover of $S_5$ whose Sylow 2-subgroups are generalized quaternion. We determine t…