Frobenius action on l-adic Chen-Ruan cohomology
Abstract
Description
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.
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
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