The label S4 means that $G$ is the full pre-image in $\GL(2,\F_p)$ of a subgroup (unique up to conjugacy) of $\PGL(2,\F_p)$ that is isomorphic to the symmetric group on $4$ elements. This case can occur only if $p$ is congruent to $1$ modulo $4$.
- Review status: reviewed
- Last edited by John Jones on 2018-06-18 03:46:46
Not referenced anywhere at the moment.
- 2018-06-18 03:46:46 by John Jones (Reviewed)