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Topologie de Gromov équivariante, structures hyperboliques et arbres réels

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Inventiones mathematicae Aims and scope

Résumé

Les objets que nous étudions sont les espaces métriques munis d'une action par isométrie d'un groupe fixé Γ. Nous définissons une «topologie» naturelle sur «l'ensemble» de ces espaces. Nous montrons un critère de compacité séquentielle par des méthodes inspirées des travaux de M. Gromov. Nous utilisons ce critère pour donner une preuve plus courte et plus géométrique de deux théorèmes: celui de M. Culler et J. Morgan sur la compacité de l'espace des arbres réels à petits stabilisateurs d'arêtes; et celui de J. Morgan sur la compactification de l'espace des structures hyperboliques sur une variété par des arbres réels à petits stabilisateurs d'arêtes.

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Paulin, F. Topologie de Gromov équivariante, structures hyperboliques et arbres réels. Invent Math 94, 53–80 (1988). https://doi.org/10.1007/BF01394344

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