Reference : Deformations of pre-symplectic structures and the Koszul L-infty-algebra
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Physical, chemical, mathematical & earth Sciences : Mathematics
Deformations of pre-symplectic structures and the Koszul L-infty-algebra
Schätz, Florian mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Mathematics Research Unit >]
Zambon, Marco [Katholieke Universiteit Leuven - KUL > Mathematics]
[en] pre-symplectic structures ; Dirac geometry ; deformation theory
[en] We study the deformation theory of pre-symplectic structures, i.e. closed two-forms of fixed rank. The main result is a parametrization of nearby deformations of a given pre-symplectic structure in terms of an $L_\infty$-algebra, which we call the Koszul $L_\infty$-algebra. This
$L_\infty$-algebra is a cousin of the Koszul dg Lie algebra associated to a Poisson manifold, and its proper geometric understanding relies on Dirac geometry. In addition, we show that a quotient of the Koszul $L_{\infty}$-algebra is isomorphic to the $L_\infty$-algebra which controls the deformations of the underlying characteristic foliation. Finally, we show that
the infinitesimal deformations of pre-symplectic structures and of foliations are both obstructed.

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