Dirac structures, moment maps and quasi-Poisson manifolds

Details Dirac structures, moment maps and quasi-Poisson manifolds Dirac structures, moment maps and quasi-Poisson manifolds

2003-10-28

arxiv.org/abs/math/0310445v3

Mathematics

Differential Geometry

36 pages. Typos and signs fixed. To appear in Progress in Mathematics, Festschrift in honor of Alan Weinstein, Birkauser

Scientific paper

We extend the correspondence between Poisson maps and actions of symplectic groupoids, which generalizes the one between momentum maps and hamiltonian actions, to the realm of Dirac geometry. As an example, we show how hamiltonian quasi-Poisson manifolds fit into this framework by constructing an ``inversion'' procedure relating quasi-Poisson bivectors to twisted Dirac structures.

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