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arXiv 1705.09705math.DS
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标准映射的随机积

Random Products of Standard Maps

Pablo D. Carrasco

摘要:

我们发展了一个一般的几何方法来建立正的李雅普诺夫指数的存在性的一类斜积。该技术被应用于显示非一致双曲性的保守部分双曲同态的中心动力学耦合产品的标准映射,特别是斜积的纤维动力学是给定的(一个连续的参数)Froeschlé家庭。这些类型的耦合系统在Arnold扩散研究的模型中表现为一些诱导映射。因此,我们能够提出新的例子,部分双曲型同构具有丰富的高维中心动力学。该方法也适用于研究移位空间上的余环,并且对纤维不要求任何低维条件。

英文摘要:

We develop a general geometric method to establish the existence of positive Lyapunov exponents for a class of skew products. The technique is applied to show non-uniform hyperbolicity of some conservative partially hyperbolic diffeomorphisms having as center dynamics coupled products of standard maps, notably for skew-products whose fiber dynamics is given by (a continuum of parameters in) the Froeschlé family. These types of coupled systems appear as some induced maps in models for the study of Arnold diffusion. Consequently, we are able to present new examples of partially hyperbolic diffeomorphisms having rich high dimensional center dynamics. The methods are also suitable for studying cocycles over shift spaces, and do not demand any low dimensionality condition on the fiber.

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