Foncteur de Picard d'un champ alg\'ebrique
Algebraic Geometry
2009-09-18 v1
Abstract
In this article we study the Picard functor and the Picard stack of an algebraic stack. We give a new and direct proof of the representability of the Picard stack. We prove that it is quasi-separated, and that the connected component of the identity is proper when the fibers of the stack are geometrically normal. We study some examples of Picard functors of classical stacks. In an appendix, we review the lisse-etale cohomology of abelian sheaves on an algebraic stack.
Cite
@article{arxiv.0711.4545,
title = {Foncteur de Picard d'un champ alg\'ebrique},
author = {Sylvain Brochard},
journal= {arXiv preprint arXiv:0711.4545},
year = {2009}
}