Zero-dimensional isomorphic dynamical models

Abstract

By an \emph{assignment} we mean a mapping from a Choquet simplex $K$ to probability measure-preserving systems, obeying some natural restrictions. We prove that if $\Phi$ is an aperiodic assignment on a Choquet simplex $K$ such that the set of extreme points $\mathsf{ex}K$ is a countable union ${\bigcup }_n{E}_n$, where each set $E_n$ is compact, zero-dimensional, and the restriction of $\Phi$ to the Bauer simplex $K_n$ spanned by $E_n$ can be `embedded' in some topological dynamical system, then $\Phi$ can be `realized' in a zero-dimensional system.

15 pages, 1 figure