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arXiv 1204.3071math.DS
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光滑区间映射的渐近展开

Asymptotic expansion of smooth interval maps

Juan Rivera-Letelier

摘要:

我们关联到每个非退化光滑区间映射的一个数字测量其全球渐近展开。我们表明,这个数字可以计算在各种不同的方式。一个结果是,几个自然的概念,非一致双曲重合。用这种方法,我们得到了Nowicki和Sands关于单临界映射的Collet-Eckmann条件的一个显著结果在具有任意数量临界点的区间映射中的推广.这也解决了Luzzatto在1维的猜想。结合Nowicki和Przytycki的一个结果,这些考虑意味着几个自然的非一致双曲性条件在拓扑共轭下是不变的。另一个推论是非退化光滑区间映射的热力学形式:一个非退化光滑映射有高温相变当且仅当它不是李雅普诺夫双曲的。

英文摘要:

We associate to each non-degenerate smooth interval map a number measuring its global asymptotic expansion. We show that this number can be calculated in various different ways. A consequence is that several natural notions of nonuniform hyperbolicity coincide. In this way we obtain an extension to interval maps with an arbitrary number of critical points of the remarkable result of Nowicki and Sands characterizing the Collet-Eckmann condition for unicritical maps. This also solves a conjecture of Luzzatto in dimension 1. Combined with a result of Nowicki and Przytycki, these considerations imply that several natural nonuniform hyperbolicity conditions are invariant under topological conjugacy. Another consequence is for the thermodynamic formalism of non-degenerate smooth interval maps: A non-degenerate smooth map has a high-temperature phase transition if and only if it is not Lyapunov hyperbolic.

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