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arxiv: math/0112037 · v2 · submitted 2001-12-04 · 🧮 math.AG

Orbifold quantum cohomology of the classifying space of a finite group

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keywords theorycohomologyfinitegrouporbifoldquantumspaceaction
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We work through, in detail, the orbifold quantum cohomology, with gravitational descendants, of the stack BG, the point modulo trivial action of a finite group G. We provide a simple description of algebraic structures on the state space of this theory. As a consequence, we find that multiple copies of commuting Virasoro algebras appear in this theory which completely determine the correlators of the theory.

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