English

Kazhdan-Margulis theorem for Invariant Random Subgroups

Group Theory 2017-06-20 v4

Abstract

Given a simple Lie group GG, we show that the lattices in GG are weakly uniformly discrete. This is a strengthening of the Kazhdan-Margulis theorem. Our proof however is straightforward --- considering general IRS rather than lattices allows us to apply a compactness argument. In terms of p.m.p. actions, we show that for every ϵ\epsilon there is an identity neighbourhood UU which intersects trivially the stabilizers of 1ϵ1-\epsilon of the points in every non-atomic GG-space.

Keywords

Cite

@article{arxiv.1510.05423,
  title  = {Kazhdan-Margulis theorem for Invariant Random Subgroups},
  author = {Tsachik Gelander},
  journal= {arXiv preprint arXiv:1510.05423},
  year   = {2017}
}

Comments

4 pages

R2 v1 2026-06-22T11:23:29.300Z