Height, graded relative hyperbolicity and quasiconvexity
[Hauteur, hyperbolicité relative graduée, et quasiconvexité]
Dahmani, François1 ; Mj, Mahan2
1 Université Grenoble Alpes, Institut Fourier F-38000 Grenoble, France
2 Tata Institute of Fundamental Research 1, Homi Bhabha Road, Mumbai-400005, India
Journal de l’École polytechnique - Mathématiques, Tome 4 (2017), pp. 515-556.
corrigé par Corrigendum to “Height graded relative hyperbolicity and quasiconvexity”
[Correction à « Hauteur, hyperbolicité relative graduée, et quasiconvexité »]

Nous introduisons les notions de hauteur géométrique d’un sous-groupe, et d’hyperbolicité relative graduée d’un groupe, avec une version géométrique de cette dernière. Nous utilisons ensuite ces notions pour caractériser la quasiconvexité des sous-groupes des groupes hyperboliques, la quasiconvexité relative des sous-groupes des groupes relativement hyperboliques, et le fait d’être convexe-cocompact dans un groupe modulaire de surface, ou dans un groupe d’automorphismes extérieurs de groupe libre.

We introduce the notions of geometric height and graded (geometric) relative hyperbolicity in this paper. We use these to characterize quasiconvexity in hyperbolic groups, relative quasiconvexity in relatively hyperbolic groups, and convex cocompactness in mapping class groups and Out(F n ).

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Accepté le :
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DOI : 10.5802/jep.50
Classification : 20F65, 20F67, 22E40
Keywords: Quasiconvex subgroups, hyperbolic groups, relatively hyperbolic groups, height, convex cocompact subgroups
Mot clés : Sous-groupes quasi-convexes, groupes hyperboliques, groupes relativement hyperboliques, groupes convexes cocompacts
Dahmani, François 1 ; Mj, Mahan 2

1 Université Grenoble Alpes, Institut Fourier F-38000 Grenoble, France
2 Tata Institute of Fundamental Research 1, Homi Bhabha Road, Mumbai-400005, India 
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Dahmani, François; Mj, Mahan. Height, graded relative hyperbolicity and quasiconvexity. Journal de l’École polytechnique - Mathématiques, Tome 4 (2017), pp. 515-556. doi : 10.5802/jep.50. http://www.numdam.org/articles/10.5802/jep.50/

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