On étudie la notion de finitude géométrique pour certaines géométries de Hilbert définies par un ouvert strictement convexe à bord de classe .
La définition dans le cadre des espaces Gromov-hyperboliques fait intervenir l’action du groupe discret considéré sur le bord de l’espace. On montre, en construisant explicitement un contre-exemple, que cette définition doit être renforcée pour obtenir des définitions équivalentes en termes de la géométrie de l’orbifold quotient, similaires à celles obtenues par Brian Bowditch en géométrie hyperbolique.
We study the notion of geometrical finiteness for those Hilbert geometries defined by strictly convex sets with boundary.
In Gromov-hyperbolic spaces, geometrical finiteness is defined by a property of the group action on the boundary of the space. We show by constructing an explicit counter-example that this definition has to be strenghtened in order to get equivalent characterizations in terms of the geometry of the quotient orbifold, similar to those obtained by Brian Bowditch in hyperbolic geometry.
Mot clés : géométrie de Hilbert, finitude géométrique, espace Gromov-hyperbolique, sous-groupes discrets des groupes de Lie, variété projective convexe
Keywords: Hilbert geometry, geometrical finiteness, Gromov-hyperbolic space, discrete sub-group of Lie groups, convex projective manifold
@article{AIF_2014__64_6_2299_0, author = {Crampon, Micka\"el and marquis, Ludovic}, title = {Finitude g\'eom\'etrique en g\'eom\'etrie de {Hilbert}}, journal = {Annales de l'Institut Fourier}, pages = {2299--2377}, publisher = {Association des Annales de l{\textquoteright}institut Fourier}, volume = {64}, number = {6}, year = {2014}, doi = {10.5802/aif.2914}, zbl = {06387341}, mrnumber = {3331168}, language = {fr}, url = {http://www.numdam.org/articles/10.5802/aif.2914/} }
TY - JOUR AU - Crampon, Mickaël AU - marquis, Ludovic TI - Finitude géométrique en géométrie de Hilbert JO - Annales de l'Institut Fourier PY - 2014 SP - 2299 EP - 2377 VL - 64 IS - 6 PB - Association des Annales de l’institut Fourier UR - http://www.numdam.org/articles/10.5802/aif.2914/ DO - 10.5802/aif.2914 LA - fr ID - AIF_2014__64_6_2299_0 ER -
%0 Journal Article %A Crampon, Mickaël %A marquis, Ludovic %T Finitude géométrique en géométrie de Hilbert %J Annales de l'Institut Fourier %D 2014 %P 2299-2377 %V 64 %N 6 %I Association des Annales de l’institut Fourier %U http://www.numdam.org/articles/10.5802/aif.2914/ %R 10.5802/aif.2914 %G fr %F AIF_2014__64_6_2299_0
Crampon, Mickaël; marquis, Ludovic. Finitude géométrique en géométrie de Hilbert. Annales de l'Institut Fourier, Tome 64 (2014) no. 6, pp. 2299-2377. doi : 10.5802/aif.2914. http://www.numdam.org/articles/10.5802/aif.2914/
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