On the entropy of processes generated by quasifactors

Abstract

Given a measurable dynamical system $(X,\mathcal{X},μ,T)$, where $X$ is a compact metric space, $\mathcal{X}$ is the Borel $σ$-algebra on $X$, $μ$ is a $T$-invariant Borel probability measure and $T$ is a homeomorphism acting on $X$ we show that, if $h_μ(T)>0$, then $h_{\widetildeμ}(\widetilde{T})>0$ for every quasifactor $\widetildeμ$ of $μ$ having full-support.