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Quasi-Poisson structures on representation spaces of surfaces
Massuyeau G., Turaev V.
http://hal.archives-ouvertes.fr/hal-00700436
Preprint, Working Paper, ...
Mathematics/Geometric Topology
Mathematics/Quantum Algebra
Quasi-Poisson structures on representation spaces of surfaces
Gwenael Massuyeau 1, Vladimir Turaev 2
1:  Institut de Recherche Mathématique Avancée (IRMA)
http://www-irma.u-strasbg.fr/
CNRS : UMR7501 – Université de Strasbourg
7 rue René-Descartes, 67084 Strasbourg Cedex, France
France
2:  Department of Mathematics at Indiana University
http://www.math.indiana.edu/
Indiana University
Bloomington IN47405, USA
United States
Given an oriented surface S with base point * on the boundary, we introduce for all N>0, a canonical quasi-Poisson bracket on the space of N-dimensional linear representations of \pi_1(S,*). Our bracket extends the well-known Poisson bracket on GL_N-invariant functions on this space. Our main tool is a natural structure of a quasi-Poisson double algebra (in the sense of M. Van den Bergh) on the group algebra of \pi_1(S,*).
English
2012-05-22

43 pages

Fulltext link: 
http://fr.arXiv.org/abs/1205.4898