Stacky Hamiltonian actions and symplectic reduction
arXiv:1808.01003 · doi:10.1093/imrn/rnz322
Abstract
We introduce the notion of a Hamiltonian action of an étale Lie group stack on an étale 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.
65 pages; appendix by Chenchang Zhu
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