Lie Group Valued Moment Maps

Details Lie Group Valued Moment Maps Lie Group Valued Moment Maps

1997-07-26

arxiv.org/abs/dg-ga/9707021v1

Physics

High Energy Physics

High Energy Physics - Theory

AMS-LaTeX, 36 pages

Scientific paper

We develop a theory of "quasi"-Hamiltonian G-spaces for which the moment map takes values in the group G itself rather than in the dual of the Lie algebra. The theory includes counterparts of Hamiltonian reductions, the Guillemin-Sternberg symplectic cross-section theorem and of convexity properties of the moment map. As an application we obtain moduli spaces of flat connections on an oriented compact 2-manifold with boundary as quasi-Hamiltonian quotients of the space G^2 x ... x G^2.

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