English

A Short Proof of Bernoulli Disjointness via the Local Lemma

Dynamical Systems 2020-04-29 v2 Combinatorics

Abstract

Recently, Glasner, Tsankov, Weiss, and Zucker showed that if Γ\Gamma is an infinite discrete group, then every minimal Γ\Gamma-flow is disjoint from the Bernoulli shift 2Γ2^\Gamma. Their proof is somewhat involved; in particular, it invokes separate arguments for different classes of groups. In this note, we give a short and self-contained proof of their result using purely combinatorial methods applicable to all groups at once. Our proof relies on the Lov\'{a}sz Local Lemma, an important tool in probabilistic combinatorics that has recently found several applications in the study of dynamical systems.

Keywords

Cite

@article{arxiv.1907.08507,
  title  = {A Short Proof of Bernoulli Disjointness via the Local Lemma},
  author = {Anton Bernshteyn},
  journal= {arXiv preprint arXiv:1907.08507},
  year   = {2020}
}

Comments

5 pages; v2: minor changes following referee's comments