Comptes Rendus
Topology/Dynamical Systems
Almost commensurability of 3-dimensional Anosov flows
Comptes Rendus. Mathématique, Volume 351 (2013) no. 3-4, pp. 127-129.

Deux flots sont dits presque commensurables si, quitte à retirer à chacun un nombre fini dʼorbites périodiques puis prendre un revêtement fini, ils sont topologiquement équivalents. On montre que toutes les suspensions dʼautomorphismes hyperboliques du tore de dimension 2 et tous les flots géodésiques sur les fibrés unitaires tangents dʼorbisurfaces hyperboliques sont deux à deux presque commensurables.

Two flows are almost commensurable if, up to removing finitely many periodic orbits and taking finite coverings, they are topologically equivalent. We prove that all suspensions of automorphisms of the 2-dimensional torus and all geodesic flows on unit tangent bundles to hyperbolic 2-orbifolds are pairwise almost commensurable.

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DOI : 10.1016/j.crma.2013.02.012
Pierre Dehornoy 1

1 Mathematisches Institut, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
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Pierre Dehornoy. Almost commensurability of 3-dimensional Anosov flows. Comptes Rendus. Mathématique, Volume 351 (2013) no. 3-4, pp. 127-129. doi : 10.1016/j.crma.2013.02.012. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2013.02.012/

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