Filippo Calderoni : Topological dynamics and torsion abelian groups

Posted by Christian Rosendal , part of the Logic Seminar.

At

Feb. 12, 2019, 3:30 p.m.

In

427 SEO

Abstract

In this talk I shall present the status of the ongoing project that aims at computing the universal minimal flow of automorphism groups of all countable torsion abelian groups. Building on work of Kechris-Pestov-Todorcevic, we shall discuss how to compute the universal minimal flow of $Aut(G)$, for some primary group $G$. More precisely, we shall consider the cases when $G$ is a quasi-cyclic group, or the infinite direct sum of $\omega$ copies of a cyclic $p$-group, for any prime $p$. This is joint work with Gianluca Basso.