Countable Primitive Groups
Abstract
We give a complete characterization of countable primitive groups in several settings including linear groups, subgroups of mapping class groups, groups acting minimally on trees and convergence groups. The latter category includes as a special case Kleinian groups as well as subgroups of word hyperbolic groups. As an application we calculate the Frattini subgroup in many of these settings, often generalizing results that were only known for finitely generated groups. In particular, we answer a question of G. Higman and B.H. Neumann on the Frattini group of an amalgamated product.
Cite
@article{arxiv.math/0503001,
title = {Countable Primitive Groups},
author = {Tsachik Gelander and Yair Glasner},
journal= {arXiv preprint arXiv:math/0503001},
year = {2007}
}
Comments
39 pages, 2 figures. The first revision generalizes our previous paper "Infinite primitive groups" from the setting of finitely generated groups to countable groups. The second revision reflects minor changes to match the version that will appear in GAFA