English

Relative uniformly positive entropy of induced amenable group actions

Dynamical Systems 2023-03-06 v2

Abstract

Let GG be a countable infinite discrete amenable group.It should be noted that a GG-system (X,G)(X,G) naturally induces a GG-system (M(X),G)(\mathcal{M}(X),G), where M(X)\mathcal{M}(X) denotes the space of Borel probability measures on the compact metric space XX endowed with the weak*-topology. A factor map π ⁣:(X,G)(Y,G)\pi\colon (X,G)\to(Y,G) between two GG-systems induces a factor map π~ ⁣:(M(X),G)(M(Y),G)\widetilde{\pi}\colon(\mathcal{M}(X),G)\to(\mathcal{M}(Y),G). It turns out that π~\widetilde{\pi} is open if and only if π\pi is open. When YY is fully supported, it is shown that π\pi has relative uniformly positive entropy if and only if π~\widetilde{\pi} has relative uniformly positive entropy.

Keywords

Cite

@article{arxiv.2206.05084,
  title  = {Relative uniformly positive entropy of induced amenable group actions},
  author = {Kairan Liu and Runju Wei},
  journal= {arXiv preprint arXiv:2206.05084},
  year   = {2023}
}

Comments

29 pages, 38 references