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arXiv math/9711214math.DS
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临界圆映射的刚性

Rigidity of critical circle mappings, I

Edson de Faria, Welington de Melo

摘要:

证明了两个具有相同旋转数的有界型$C^r$临界圆映射对于某些$α>0$是$C^{1+α}$共轭的,只要它们的连续重正化在$C^0$意义下以指数速度收敛在一起.数字$α$仅取决于收敛的收敛速率。我们还给出了具有相同旋转数的$C^\infty$临界圆映射的例子,这些映射对于任何$β>0$都不是$C^{1+β}$共轭的。

英文摘要:

We prove that two $C^r$ critical circle maps with the same rotation number of bounded type are $C^{1+α}$ conjugate for some $α>0$ provided their successive renormalizations converge together at an exponential rate in the $C^0$ sense. The number $α$ depends only on the rate of convergence. We also give examples of $C^\infty$ critical circle maps with the same rotation number that are not $C^{1+β}$ conjugate for any $β>0$.

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