A 2-cocycle on a group of symplectomorphisms

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For a symplectic manifold $(M,\om)$ with exact symplectic form we construct a 2-cocycle on the group of symplectomorphisms and indicate cases when this cocycle is not trivial.
9 pages, Latex, shortened version, new coauthor, title changed

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Group Theory, Symplectic Geometry, 58D05, 20J06, 22E65

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http://salesiana.dossiersoluciones.com/handle/123456789/132983

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0410100
 http://arxiv.org/abs/math/0410100
 Moscow Math. J. 6 (2006), 307-315

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arXiv