Chern-Weil map for principal bundles over groupoids

Camille Laurent-Gengoux, Jean Louis Tu, Ping Xu

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The theory of principal G-bundles over a Lie groupoid is an important one unifying various types of principal G-bundles including those over manifolds those over orbifolds as well as equivariant principal G-bundles. In this paper we study differential geometry of these objects including connections and holonomy maps. We also introduce a Chern-Weil map for these principal bundles and prove that the characteristic classes obtained coincide with the universal characteristic classes. As an application we recover the equivariant Chern-Weil map of Bott-Tu. We also obtain an explicit chain map between the Weil model and the simplicial model of equivariant cohomology which reduces to the Bott-Shulman map S(g*)G → H* (BG) when the manifold is a point.

Original languageEnglish (US)
Pages (from-to)451-491
Number of pages41
JournalMathematische Zeitschrift
Issue number3
StatePublished - Mar 2007

All Science Journal Classification (ASJC) codes

  • General Mathematics


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