K. Behrend

activity

19972005

most citedDonaldson-Thomas invariants via microlocal geometry

139 citations · 176 across the 8 of their papers we have counts for

collaborators

Showing 2003Show all

2 papers · 1 filter

math.SG2003

Equivariant gerbes over compact simple Lie groups

Kai Behrend, Ping Xu, Bin Zhang

Using groupoid $S^{1}$ -central extensions, we present, for a compact simple Lie group $G$ , an infinite dimensional model of $S^{1}$ -gerbe over the differential stack $G / G$ whose Dixmie…

math.DG2003

S^1-bundles and gerbes over differentiable stacks

Kai Behrend, Ping Xu

We study $S^{1}$ -bundles and $S^{1}$ -gerbes over differentiable stacks in terms of Lie groupoids, and construct Chern classes and Dixmier-Douady classes in terms of analogues of connec…