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arXiv 2405.11366math.DS
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全部、大多数还是少数?关于区间上被扭曲和/或共轭于自身幂次的微分同胚

All, most, some? On diffeomorphisms of the interval that are distorted and/or conjugate to powers of themselves

Hélène Eynard-Bontemps, Andrés Navas

AI总结:

本研究探讨区间微分同胚共轭于自身幂次的问题,分析了不同正则性下相关集合的稠密性与泛型性等性质,补充了区间微分同胚群扭曲元素的相关结果。

摘要:

我们研究将区间上的微分同胚共轭于其(正)幂次的问题。尽管这对同胚而言总是可行的,但光滑情形下的情况相当值得探究。除了由双曲不动点带来的显然阻碍外,还需考虑若干其他方面。作为具体结果,我们证明:在$C^1$类中,若我们限定于仅含抛物不动点的微分同胚的(闭)子集,则共轭于自身幂次的微分同胚构成的集合是稠密的,但其补集是泛型的。然而在更高正则性下,补集包含一个开且稠密的集合。本文还补充了若干关于不同正则性下区间微分同胚群的扭曲元素的注记与结果。

英文摘要:

We study the problem of conjugating a diffeomorphism of the interval to (positive) powers of itself. Although this is always possible for homeomorphisms, the smooth setting is rather interesting. Besides the obvious obstruction given by hyperbolic fixed points, several other aspects need to be considered. As concrete results we show that, in class $C^1$, if we restrict to the (closed) subset of diffeomorphisms having only parabolic fixed points, then the set of diffeomorphisms that are conjugate to their powers is dense, but its complement is generic. In higher regularity, however, the complementary set contains an open and dense set. The text is complemented with several remarks and results concerning distortion elements of the group of diffeomorphisms of the interval in several regularities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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