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arXiv math/9601214math.DS
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某些类多项式映射的Teichmuller距离

Teichmuller distance for some polynomial-like maps

Eduardo A. Prado

摘要:

在这篇文章中,我们将证明某类广义多项式映射(非临界双曲广义多项式映射)的所有元素的Teichmüller距离实际上是一个距离,就像Sullivan研究的具有连通朱利亚集的实多项式的情况一样。这个类包含几个重要的类广义多项式映射,即:Yoccoz,Lyubich,Sullivan和Fibonacci。在我们的证明中,我们不能使用外部参数(如外部类)。相反,我们在映射的朱利亚集中使用双曲集。这些双曲集将允许我们使用我们的主要分析工具,即沙利文的刚性定理的非线性解析双曲系统。Lyubich在任意有理函数$f$的朱利亚集上构造了极大熵测度$m$.当$m$的Hausdorff维数等于朱利亚集的豪斯多夫维数时,Zdunik可以准确分类.证明了当$f$为非临界双曲时,除切比雪夫多项式外,严格不等式成立.如果我们把$f$看作多项式,则这个结果是Zdunik结果的一个特例,但是如果$f$是广义多项式映射,则这个结果是Zdunik结果的一个推广。证明如下从不存在不变仿射结构。

英文摘要:

In this work we will show that the Teichmüller distance for all elements of a certain class of generalized polynomial-like maps (the class of off-critically hyperbolic generalized polynomial-like maps) is actually a distance, as in the case of real polynomials with connected Julia set, as studied by Sullivan. This class contains several important classes of generalized polynomial-like maps, namely: Yoccoz, Lyubich, Sullivan and Fibonacci. In our proof we can not use external arguments (like external classes). Instead we use hyperbolic sets inside the Julia sets of our maps. Those hyperbolic sets will allow us to use our main analytic tool, namely Sullivan's rigidity Theorem for non-linear analytic hyperbolic systems. Lyubich has constructed a measure of maximal entropy measure $m$ on the Julia set of any rational function $f$. Zdunik classified exactly when the Hausdorff dimension of $m$ equals the Hausdorff dimension of the Julia set. We show that the strict inequality holds if $f$ is off-crititcally hyperbolic, except for Chebyshev polynomials. This result is a particular case of Zdunik's result if we consider $f$ as a polynomial, but is an extension of Zdunik's result if $f$ is a generalized polynomial-like map. The proof follows from the non-existence of invariant affine structure.

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