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Relatively weakly mixing models for dynamical systems

Published online by Cambridge University Press:  10 November 2014

ZHENGXING LIAN  and
SONG SHAO
ZHENGXING LIAN
Affiliation:
Department of Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, PR China email lianzx@mail.ustc.edu.cn, songshao@ustc.edu.cn
SONG SHAO
Affiliation:
Department of Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, PR China email lianzx@mail.ustc.edu.cn, songshao@ustc.edu.cn
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Abstract

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A classical result in ergodic theory says that there always exists a topological model for any factor map ${\it\pi}:(X,{\mathcal{X}},{\it\mu},T)\rightarrow (Y,{\mathcal{Y}},{\it\nu},S)$ of ergodic systems. That is, there are some topological factor map $\hat{{\it\pi}}:(\hat{X},\hat{T})\rightarrow ({\hat{Y}},{\hat{S}})$ and invariant measures $\hat{{\it\mu}}$, $\hat{{\it\nu}}$ such that the diagram

$$\begin{eqnarray}\displaystyle & & \displaystyle \nonumber\end{eqnarray}$$
is commutative, where ${\it\phi}$ and ${\it\psi}$ are measure theoretical isomorphisms. In this paper, we show that one can require that in the above result $\hat{{\it\pi}}$ is either weakly mixing or finite-to-one. Also, we present some related questions.

Information

Type
Research Article
Information
Ergodic Theory and Dynamical Systems , Volume 36 , Issue 4 , June 2016 , pp. 1204 - 1220
Copyright
© Cambridge University Press, 2014 

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