85 citations · 145 across the 12 of their papers we have counts for
Showing 2003 · math.SGShow all
2 papers · 2 filters
math.SG2003
Momentum Maps and Morita Equivalence
Ping Xu
We introduce quasi-symplectic groupoids and explain their relation with momentum map theories. This approach enables us to unify into a single framework various momentum map theori…
math.SG2003
Equivariant gerbes over compact simple Lie groups
Kai Behrend, Ping Xu, Bin Zhang
Using groupoid -central extensions, we present, for a compact simple Lie group , an infinite dimensional model of -gerbe over the differential stack whose Dixmie…