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arXiv 1012.0513math.DSmath.PR
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一维中心方向的物理度量与绝对连续性

Physical Measure and Absolute Continuity for One-Dimensional Center Direction

Marcelo Viana, Jiagang Yang

摘要:

对于一类具有圆心叶的部分双曲$C^k$,$k>1$类同态,证明了物理(或Sinai-Ruelle-Bowen)测度的存在性和有限性,其盆域覆盖了环境流形的一个完整的勒贝格测度子集.我们的条件包含一个开的和稠密的子集的所有$C^k$部分双曲斜积的紧圆丛。我们的论点融合的思想,从理论的吉布斯态的主要是收缩中心方向的同形,以及最近的进展,在双曲系统的上循环理论,调用发挥几何性质不变的叶理,如绝对连续性。最近的结果表明,绝对连续的中心叶理往往是一个刚性的性质之间的体积保持系统。我们证明,这是不是在所有的情况下,在耗散设置,绝对连续性甚至可以是强大的。

英文摘要:

For a class of partially hyperbolic $C^k$, $k>1$ diffeomorphisms with circle center leaves we prove existence and finiteness of physical (or Sinai-Ruelle-Bowen) measures, whose basins cover a full Lebesgue measure subset of the ambient manifold. Our conditions contain an open and dense subset of all $C^k$ partially hyperbolic skew-products on compact circle bundles. Our arguments blend ideas from the theory of Gibbs states for diffeomorphisms with mostly contracting center direction together with recent progress in the theory of cocycles over hyperbolic systems that call into play geometric properties of invariant foliations such as absolute continuity. Recent results show that absolute continuity of the center foliation is often a rigid property among volume preserving systems. We prove that this is not at all the case in the dissipative setting, where absolute continuity can even be robust.

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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