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

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Hauptverfasser: Eynard-Bontemps, Hélène, Navas, Andrés
Format: Preprint
Veröffentlicht: 2024
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author Eynard-Bontemps, Hélène
Navas, Andrés
author_facet Eynard-Bontemps, Hélène
Navas, Andrés
contents 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.
format Preprint
id arxiv_https___arxiv_org_abs_2405_11366
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle All, most, some? On diffeomorphisms of the interval that are distorted and/or conjugate to powers of themselves
Eynard-Bontemps, Hélène
Navas, Andrés
Dynamical Systems
37C05, 37C10, 37C15, 37C85, 37E05, 57M60. 37C05, 37C10, 37C15, 37C85, 37E05, 57M60. 37C05, 37C10, 37C15, 37C85, 37E05, 37M60
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.
title All, most, some? On diffeomorphisms of the interval that are distorted and/or conjugate to powers of themselves
topic Dynamical Systems
37C05, 37C10, 37C15, 37C85, 37E05, 57M60. 37C05, 37C10, 37C15, 37C85, 37E05, 57M60. 37C05, 37C10, 37C15, 37C85, 37E05, 37M60
url https://arxiv.org/abs/2405.11366