Boundary amenability of groups via ultrapowers
Group Theory
2016-10-31 v1 General Topology
Operator Algebras
Abstract
We use -algebra ultrapowers to give a new construction of the Stone-Cech compactification of a separable, locally compact space. We use this construction to give a new proof of the fact that groups that act isometrically, properly, and transitively on trees are boundary amenable.
Keywords
Cite
@article{arxiv.1610.09276,
title = {Boundary amenability of groups via ultrapowers},
author = {Stephen Avsec and Isaac Goldbring},
journal= {arXiv preprint arXiv:1610.09276},
year = {2016}
}
Comments
9 pages