Paper 1, Section I, F

Geometry and Groups
Part II, 2014

Let GSO(3)G \leqslant S O(3) be a finite group. Suppose GG does not preserve any plane in R3\mathbb{R}^{3}. Show that for any point pp in the unit sphere S2R3S^{2} \subset \mathbb{R}^{3}, the stabiliser StabG(p)\operatorname{Stab}_{G}(p) contains at most 5 elements.