Family independence for topological and measurable dynamics
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- by Wen Huang, Hanfeng Li and Xiangdong Ye PDF
- Trans. Amer. Math. Soc. 364 (2012), 5209-5242 Request permission
Abstract:
For a family $\mathcal {F}$ (a collection of subsets of $\mathbb {Z}_+$), the notion of $\mathcal {F}$-independence is defined both for topological dynamics (t.d.s.) and measurable dynamics (m.d.s.). It is shown that there is no non-trivial {syndetic}-independent m.d.s.; an m.d.s. is {positive-density}-independent if and only if it has completely positive entropy; and an m.d.s. is weakly mixing if and only if it is {IP}-independent. For a t.d.s. it is proved that there is no non-trivial minimal {syndetic}-independent system; a t.d.s. is weakly mixing if and only if it is {IP}-independent.
Moreover, a non-trivial proximal topological K system is constructed, and a topological proof of the fact that minimal topological K implies strong mixing is presented.
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Additional Information
- Wen Huang
- Affiliation: Department of Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
- MR Author ID: 677726
- Email: wenh@mail.ustc.edu.cn
- Hanfeng Li
- Affiliation: Department of Mathematics, Chongqing University, Chongqing 401331, People’s Republic of China – and – Department of Mathematics, SUNY at Buffalo, Buffalo, New York 14260-2900
- Email: hfli@math.buffalo.edu
- Xiangdong Ye
- Affiliation: Department of Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
- MR Author ID: 266004
- Email: yexd@ustc.edu.cn
- Received by editor(s): December 14, 2009
- Received by editor(s) in revised form: August 25, 2010
- Published electronically: May 2, 2012
- Additional Notes: The first author was partially supported by the NNSF of China (10911120388), the Fok Ying Tung Education Foundation, FANEDD (Grant 200520) and the Fundamental Research Funds for the Central Universities
The second author was partially supported by NSF grant DMS-0701414
The first and third authors were partially supported by grants from NNSF of China (10531010, 11071231) and 973 Project (2006CB805903) - © Copyright 2012
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication. - Journal: Trans. Amer. Math. Soc. 364 (2012), 5209-5242
- MSC (2010): Primary 37B40, 37A35, 37B10, 37A05
- DOI: https://doi.org/10.1090/S0002-9947-2012-05493-6
- MathSciNet review: 2931327