Generic free subgroups and statistical hyperbolicity
Generic free subgroups and statistical hyperbolicity
复制标题
一般自由子群和统计双曲性
DOI:
10.4171/ggd/593
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发表时间:
2018-12
期刊:
影响因子:
--
通讯作者:
Wenyuan Yang
中科院分区:
文献类型:
--
作者:
Suzhen Han;Wenyuan Yang
This paper studies the generic behavior of $k$-tuple elements for $k\ge 2$ in a proper group action with contracting elements, with applications towards relatively hyperbolic groups, CAT(0) groups and mapping class groups. For a class of statistically convex-cocompact action, we show that an exponential generic set of $k$ elements for any fixed $k\ge 2$ generates a quasi-isometrically embedded free subgroup of rank $k$. For $k=2$, we study the sprawl property of group actions and establish that the class of statistically convex-cocompact actions is statistically hyperbolic in a sense of M. Duchin, S. Leli\`evre, and C. Mooney.
For any proper action with a contracting element, if it satisfies a condition introduced by Dal'bo-Otal-Peign\'e and has purely exponential growth, we obtain the same results on generic free subgroups and statistical hyperbolicity.
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期刊:
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