2011-26.md

course	course_year	question_number	tags	title	year
Geometry	IB	26	IB 2011 Geometry	Paper 2, Section II, F	2011

Suppose that $\pi: S^{2} \rightarrow \mathbb{C}_{\infty}$ is stereographic projection. Show that, via $\pi$, every rotation of $S^{2}$ corresponds to a Möbius transformation in $P S U(2)$.