Frobenius action on l-adic Chen-Ruan cohomology

Details Frobenius action on l-adic Chen-Ruan cohomology Frobenius action on l-adic Chen-Ruan cohomology

2007-01-07

arxiv.org/abs/math/0701213v2

Mathematics

Algebraic Geometry

Updated to match version published in Communication in Number Theory and Physics, 2007. Conjecture 6.3 has been replaced with

Scientific paper

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.

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