2008
DOI: 10.3842/sigma.2008.005
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Poisson Manifolds, Lie Algebroids, Modular Classes: a Survey

Abstract: Abstract. After a brief summary of the main properties of Poisson manifolds and Lie algebroids in general, we survey recent work on the modular classes of Poisson and twisted Poisson manifolds, of Lie algebroids with a Poisson or twisted Poisson structure, and of Poisson-Nijenhuis manifolds. A review of the spinor approach to the modular class concludes the paper.

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Cited by 44 publications
(76 citation statements)
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“…Another important fact, which we will use in Section 6, is that the Poisson structure π gives a Lie algebroid structure on the cotangent bundle T * X [15,22,29]; in particular, the anchor map π # is a Lie morphism between the sheaf of 1-forms, endowed with the Koszul-Magri bracket and the sheaf of tangent vector fields [23, equation 3.3].…”
Section: Review Of Koszul Bracketsmentioning
confidence: 99%
“…Another important fact, which we will use in Section 6, is that the Poisson structure π gives a Lie algebroid structure on the cotangent bundle T * X [15,22,29]; in particular, the anchor map π # is a Lie morphism between the sheaf of 1-forms, endowed with the Koszul-Magri bracket and the sheaf of tangent vector fields [23, equation 3.3].…”
Section: Review Of Koszul Bracketsmentioning
confidence: 99%
“…Note that Λ(a, b) is not unimodular (see for instance [11] for a recent survey on the modular class of a Poisson manifold). Indeed, there is no Poincaré duality between HP k (Λ(a, b)) and HP 2−k (Λ(a, b)).…”
Section: Introductionmentioning
confidence: 99%
“…Remarquons que Λ(a, b) n'est pas unimodulaire (voir par exemple [11] pour un exposé récent sur la classe modulaire d'une variété de Poisson). En effet, il n'y a pas de dualité de Poincaré entre HP k (Λ(a, b)) et HP 2−k (Λ(a, b)).…”
unclassified
“…It is known that the modular class of a Poisson manifold M is an obstruction to the existence of a volume form on M , which is invariant under the action of Hamiltonian vector fields [29], see also [30] and references therein. Since a Hamiltonian vector field X f = −d θ f is a particular case of the β-diffeomorphism, it is natural to expect that there is a desired volume form when the modular class is trivial.…”
Section: Invariant Measurementioning
confidence: 99%
“…The β-diffeomorphism acts on a coordinate function x i as 29) so that the first term of each equation in (2.28) comes from the shift of the argument x i → x i − θ ki ζ k . It acts also on the coordinate basis dx i of T * M as 30) so that the matrix M (ζ) of the change of basis in…”
Section: Tensor Calculusmentioning
confidence: 99%