Toute action d'un groupe de Baumslag-Solitar ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Toute action d'un groupe de Baumslag-Solitar sur les surfaces a une orbite finie
Auteur(s) :
Titre de la revue :
Ergodic Theory and Dynamical Systems
Pagination :
3353-3364
Éditeur :
Cambridge University Press (CUP)
Date de publication :
2019-12
ISSN :
0143-3857
Discipline(s) HAL :
Mathématiques [math]
Résumé en anglais : [en]
We consider f, h homeomorphims generating a faithful BS(1, n)-action on a closed surface S, that is, hf h-1 = f n , for some n ≥ 2. According to [GL], after replacing f by a suitable iterate if necessary, we can assume ...
Lire la suite >We consider f, h homeomorphims generating a faithful BS(1, n)-action on a closed surface S, that is, hf h-1 = f n , for some n ≥ 2. According to [GL], after replacing f by a suitable iterate if necessary, we can assume that there exists a minimal set Λ of the action, included in F ix(f). Here, we suppose that f and h are C 1 in neighbourhood of Λ and any point x ∈ Λ admits an h-unstable manifold W u (x). Using Bonatti's techniques, we prove that either there exists an integer N such that W u (x) is included in F ix(f N) or there is a lower bound for the norm of the differential of h only depending on n and the Riemannian metric on S. Combining last statement with a result of [AGX], we show that any faithful action of BS(1, n) on S with h a pseudo-Anosov homeomorphism has a finite orbit containing singularities of h ; moreover if f is isotopic to identity it is entirely contained in the singular set of h. As a consequence, there is no faithful C 1-action of BS(1, n) on the torus with h an Anosov.Lire moins >
Lire la suite >We consider f, h homeomorphims generating a faithful BS(1, n)-action on a closed surface S, that is, hf h-1 = f n , for some n ≥ 2. According to [GL], after replacing f by a suitable iterate if necessary, we can assume that there exists a minimal set Λ of the action, included in F ix(f). Here, we suppose that f and h are C 1 in neighbourhood of Λ and any point x ∈ Λ admits an h-unstable manifold W u (x). Using Bonatti's techniques, we prove that either there exists an integer N such that W u (x) is included in F ix(f N) or there is a lower bound for the norm of the differential of h only depending on n and the Riemannian metric on S. Combining last statement with a result of [AGX], we show that any faithful action of BS(1, n) on S with h a pseudo-Anosov homeomorphism has a finite orbit containing singularities of h ; moreover if f is isotopic to identity it is entirely contained in the singular set of h. As a consequence, there is no faithful C 1-action of BS(1, n) on the torus with h an Anosov.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Projet ANR :
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Source :
Date de dépôt :
2025-01-24T14:30:20Z
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