Comptes Rendus
Differential Geometry
Equivariant gerbes over compact simple Lie groups
Comptes Rendus. Mathématique, Volume 336 (2003) no. 3, pp. 251-256.

Using groupoid S1-central extensions, we present, for a compact simple Lie group G, an infinite dimensional model of S1-gerbe over the differential stack G/G whose Dixmier–Douady class corresponds to the canonical generator of the equivariant cohomology HG3(G).

En utilisant des extensions S1-centrales de groupoı̈des, nous présentons, dans le cas d'un groupe simple compact G, un modèle de dimension infinie d'une S1-gerbe sur un champ différentiable G/G dont la classe de Dixmier–Douady correspond au générateur canonique de la cohomologie équivariante HG3(G).

Received:
Accepted:
Published online:
DOI: 10.1016/S1631-073X(02)00024-9

Kai Behrend 1; Ping Xu 2; Bin Zhang 3

1 Department of Mathematics, University of British Columbia, 1984 Mathematics Road, Vancouver BC, V6T IZ2, Canada
2 Department of Mathematics, Pennsylvania State University, University Park, PA 16802, USA
3 Department of Mathematics, State University of New York at Stony Brook, Stony Brook, NY 11794-3600, USA
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Kai Behrend; Ping Xu; Bin Zhang. Equivariant gerbes over compact simple Lie groups. Comptes Rendus. Mathématique, Volume 336 (2003) no. 3, pp. 251-256. doi : 10.1016/S1631-073X(02)00024-9. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/S1631-073X(02)00024-9/

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