Twisted jets, motivic measure and orbifold cohomology
Takehiko Yasuda
Abstract
We introduce the notion of twisted jet on a Deligne-Mumford stack. and study the motivic measure on the space of the twisted ∞-jets on a smooth Deligne-Mumford stack. As an application, we prove that two birational minimal models with Gorenstein quotient singularities have the same orbifold cohomology with Hodge structure.
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