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Positive entropy actions of countable groups factor onto Bernoulli shifts
Journal of the American Mathematical Society ( IF 3.5 ) Pub Date : 2019-09-27 , DOI: 10.1090/jams/931
Brandon Seward

We prove that if a free ergodic action of a countably infinite group has positive Rokhlin entropy (or, less generally, positive sofic entropy) then it factors onto all Bernoulli shifts of lesser or equal entropy. This extends to all countably infinite groups the well-known Sinai factor theorem from classical entropy theory.

中文翻译:

可数群的正熵作用对伯努利位移的影响

我们证明,如果一个可数无限群的自由遍历行为具有正 Rokhlin 熵(或者,不太普遍地,正的 Sofic 熵),那么它会影响所有小于或等于熵的伯努利位移。这将经典熵理论中著名的西奈因子定理扩展到所有可数无限群。
更新日期:2019-09-27
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