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22 October 2020
  » arxiv » math.DG/0406350

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Equivariant cohomology and the Maurer-Cartan equation
A. Alekseev ; E. Meinrenken ;
Date 17 Jun 2004
Subject Differential Geometry; Algebraic Topology | math.DG math.AT
AbstractLet G be a compact, connected Lie group, acting smoothly on a manifold M. Goresky-Kottwitz-MacPherson described a small Cartan model for the equivariant cohomology of M, quasi-isomorphic to the standard Cartan complex of equivariant differential forms. In this paper, we construct an explicit cochain map from the small Cartan model into the standard Cartan model, inducing an isomorphism in cohomology. The construction involves the solution of a remarkable inhomogeneous Maurer-Cartan equation. This solution has further applications to the theory of transgression in the Weil algebra, and to the Chevalley-Koszul theory of the cohomology of principal bundles.
Source arXiv, math.DG/0406350
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