Frobenius action on l-adic Chen-Ruan cohomology
Algebraic Geometry
2008-12-24 v2 Number Theory
Abstract
We extend the definition of the Chen-Ruan cohomology ring to smooth, proper, tame, Deligne-Mumford stacks over fields of positive characteristic and prove that a modified version of the Frobenius action preserves the product.
Keywords
Cite
@article{arxiv.math/0701213,
title = {Frobenius action on l-adic Chen-Ruan cohomology},
author = {Michael A. Rose},
journal= {arXiv preprint arXiv:math/0701213},
year = {2008}
}
Comments
Updated to match version published in Communication in Number Theory and Physics, 2007. Conjecture 6.3 has been replaced with a Theorem following the work of Yasuda. The title of the article has been updated