On the variation of the Poisson structures of certain moduli spaces

Details On the variation of the Poisson structures of certain moduli spaces On the variation of the Poisson structures of certain moduli spaces

1997-10-29

arxiv.org/abs/dg-ga/9710033v1

Math. Ann. 319 (2001), 267-310

Mathematics

Differential Geometry

AMSTeX 2.1, 24 pages

Scientific paper

Given a Lie group G whose Lie algebra is endowed with a nondegenerate invariant symmetric bilinear form, we construct a Poisson algebra of continuous functions on a certain open subspace R of the space of representations in G of the fundamental group of a compact connected orientable topological surface with finitely many boundary circles; when G is compact and connected, R may be taken dense in the space of all representations. The space R contains spaces of representations where the values of those generators of the fundamental group which correspond to the boundary circles are constrained to lie in fixed conjugacy classes and, on these representation spaces, the Poisson algebra restricts to stratified symplectic Poisson algebras constructed elsewhere earlier. Hence the Poisson algebra on R gives a description of the variation of the stratified symplectic Poisson structures on the smaller representation spaces as the chosen conjugacy classes move.

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