Geodesic
Surfaces et cohomologie bornée.
Inventiones mathematicae, Tome 92 (1988) no. 1, pp. 509-526.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : second cohomology group of a group, bounded cohomology, discrete group, nilpotent group, amenable groups, polycyclic groups, fundamental groups of surfaces, 2-form, bounded cocycle, surface of negative curvature, ideal triangles, constant negative curvature 
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     author = {Jean Barge and Etienne Ghys},
     title = {Surfaces et cohomologie born\'ee.},
     journal = {Inventiones mathematicae},
     pages = {509--526},
     publisher = {mathdoc},
     volume = {92},
     number = {1},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__92_1_143580/}
}
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Jean Barge; Etienne Ghys. Surfaces et cohomologie bornée.. Inventiones mathematicae, Tome 92 (1988) no. 1, pp. 509-526. http://geodesic.mathdoc.fr/item/IM_1988__92_1_143580/