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Formal deformations of Dirac structures. (English) Zbl 1112.58018
Author’s abstract: In this paper we set-up a general framework for a formal deformation theory of Dirac structures. We give a parameterization of formal deformations in terms of two-forms obeying a cubic equation. The notion of equivalence is discussed in detail. We show that the obstruction for the construction of deformations order by order lies in the third Lie algebroid cohomology of the Dirac structure. However, the classification of inequivalent first order deformations is not given by the second Lie algebroid cohomology but turns out to be more complicated.

##### MSC:
 58H15 Deformations of general structures on manifolds 53D17 Poisson manifolds; Poisson groupoids and algebroids
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##### References:
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