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arXiv 1609.08489math.DS
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周期测度与部分双曲同宿类

Periodic measures and partially hyperbolic homoclinic classes

Christian Bonatti, Jinhua Zhang

AI总结:

本文证明鲁棒环产生的非双曲遍历测度在 C^1 开稠条件下可由周期测度逼近,并刻画一维中心部分双曲系统中遍历测度闭包的凸集结构。

摘要:

本文中,我们为以下事实给出了精确含义并对其加以证明:在 C^1 开且稠密的意义下,由鲁棒环生成的所有非双曲遍历测度都可由周期测度逼近。我们将该技术应用于具有一维中心的部分双曲微分同胚的全局情形。当强稳定叶理与强不稳定叶理均为极小时,我们得到:遍历测度集合的闭包是两个凸集的并,这两个凸集对应两种可能的 s-index;二者沿非双曲遍历测度集合的闭包相交。对于传递 Anosov 流的时间一映射,或 Anosov 环面微分同胚按圆周旋转构成的斜积,其鲁棒传递扰动正属于这种情形。

英文摘要:

In this paper, we give a precise meaning to the following fact, and we prove it: $C^1$-open and densely, all the non-hyperbolic ergodic measures generated by a robust cycle are approximated by periodic measures. We apply our technique to the global setting of partially hyperbolic diffeomorphisms with one dimensional center. When both strong stable and unstable foliations are minimal, we get that the closure of the set of ergodic measures is the union of two convex sets corresponding to the two possible $s$-indices; these two convex sets intersect along the closure of the set of non-hyperbolic ergodic measures. That is the case for robustly transitive perturbation of the time one map of a transitive Anosov flow, or of the skew product of an Anosov torus diffeomorphism by rotation of the circle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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