English

Topological Dynamics of Closed Subgroups of $S_\infty$

Logic 2014-05-09 v2 Combinatorics Dynamical Systems General Topology

Abstract

For GG a closed subgroup of SS_{\infty}, we provide an explicit characterization of the greatest GG-ambit. Using this, we provide a precise characterization of when GG has metrizable universal minimal flow. In particular, each such instance fits into the framework of metrizable flows developed by Kechris-Pestov-Todorcevic and Nguyen Van Th\'e; as a consequence, each GG with metrizable universal minimal flow has the generic point property.

Keywords

Cite

@article{arxiv.1404.5057,
  title  = {Topological Dynamics of Closed Subgroups of $S_\infty$},
  author = {Andy Zucker},
  journal= {arXiv preprint arXiv:1404.5057},
  year   = {2014}
}

Comments

Minor errors and typos have been corrected