FROBENIUS ACTION ON l-ADIC ORBIFOLD COHOMOLOGY
نویسنده
چکیده
We extend the definition of orbifold (Chen-Ruan) cohomology to tame Deligne-Mumford stacks over fields of positive characteristic and prove that a modified version of the Frobenius action preserves the product. We conjecture a relationship between the arithmetic information contained by this action and the zeta function of a crepant resolution of the coarse moduli space (when each exist).
منابع مشابه
FROBENIUS ACTION ON l-ADIC CHEN-RUAN COHOMOLOGY
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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تاریخ انتشار 2007