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Stacky Hamiltonian actions and symplectic reduction
Published 2 Aug 2018 in math.SG and math.DG | (1808.01003v3)
Abstract: We introduce the notion of a Hamiltonian action of an \'etale Lie group stack on an \'etale symplectic stack and establish versions of the Kirwan convexity theorem, the Meyer-Marsden-Weinstein symplectic reduction theorem, and the Duistermaat-Heckman theorem in this context.
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