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arXiv 1602.04649math.DS
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一般动力学Lagrange谱和Markov谱上豪斯多夫维数的连续性

Continuity of Hausdorff dimension across generic dynamical Lagrange and Markov spectra

Aline Cerqueira, Carlos Matheus, Carlos Gustavo Moreira

摘要:

设$φ_0$是紧致曲面$M$的保面积光滑同态,$Λ_0$是$φ_0$的马蹄形,且豪斯多夫维数严格小于1.给定一个光滑函数$f:M\to \mathbb{R}$和$φ_0$的一个小的保面积光滑扰动$φ$,分别设$L_{φ, f}$和$φ_0$的一个小的保面积光滑扰动$φ$. $M_{φ, f}$分别是拉格朗日方程。马尔可夫谱的渐近最高,分别。$f$沿$φ$的最高值-通过$Λ_0$的双曲延拓获得的马蹄形$Λ$中的点的轨道。我们发现,对于$φ$和$f$的泛型选择,集合$L_{φ, f}\cap (-\infty, t)$的豪斯多夫维数随$t\in\mathbb{R}$连续变化,而且对于所有$t\in\mathbb{R}$,$M_{φ, f}\cap (-\infty, t)$具有与$L_{φ, f}\cap (-\infty, t)$相同的豪斯多夫维数。

英文摘要:

Let $φ_0$ be a smooth area-preserving diffeomorphism of a compact surface $M$ and let $Λ_0$ be a horseshoe of $φ_0$ with Hausdorff dimension strictly smaller than one. Given a smooth function $f:M\to \mathbb{R}$ and a small smooth area-preserving perturtabion $φ$ of $φ_0$, let $L_{φ, f}$, resp. $M_{φ, f}$ be the Lagrange, resp. Markov spectrum of asymptotic highest, resp. highest values of $f$ along the $φ$-orbits of points in the horseshoe $Λ$ obtained by hyperbolic continuation of $Λ_0$. We show that, for generic choices of $φ$ and $f$, the Hausdorff dimension of the sets $L_{φ, f}\cap (-\infty, t)$ vary continuously with $t\in\mathbb{R}$ and, moreover, $M_{φ, f}\cap (-\infty, t)$ has the same Hausdorff dimension of $L_{φ, f}\cap (-\infty, t)$ for all $t\in\mathbb{R}$.

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