Supergroupoids, double structures, and equivariant cohomology
Abstract
Q-groupoids and Q-algebroids are, respectively, supergroupoids and superalgebroids that are equipped with compatible homological vector fields. These new objects are closely related to the double structures of Mackenzie; in particular, we show that Q-groupoids are intermediary objects between Mackenzie's LA-groupoids and double complexes, which include as a special case the simplicial model of equivariant cohomology. There is also a double complex associated to a Q-algebroid, which in the above special case is the BRST model of equivariant cohomology. Other special cases include models for the Drinfel'd double of a Lie bialgebra and Ginzburg's equivariant Poisson cohomology. Finally, a supergroupoid version of the van Est map is used to give a homomorphism from the double complex of a Q-groupoid to that of a Q-algebroid.
Cite
@article{arxiv.math/0605356,
title = {Supergroupoids, double structures, and equivariant cohomology},
author = {Rajan Amit Mehta},
journal= {arXiv preprint arXiv:math/0605356},
year = {2007}
}
Comments
UC Berkeley Ph.D. thesis; 111 pages