On periodic groups of homeomorphisms of the 2-dimensional sphere
arXiv:1712.02197 · doi:10.2140/agt.2018.18.4093
Abstract
We prove that every finitely-generated group of homeomorphisms of the 2-dimensional sphere all of whose elements have a finite order which is a power of 2 and so that there exists a uniform bound for the order of group elements is finite. We prove a similar result for groups of area-preserving homeomorphisms without the hypothesis that the orders of group elements are powers of 2 provided there is an element of even order.
14 pages