Second et troisième espaces de cohomologie différentiable de l'algèbre de Lie de Poisson d'une variété symplectique
Symplectic connections with parallel Ricci tensor
A variational principle introduced to select some symplectic connections leads to field equations which, in the case of the Levi Civita connection of Kähler manifolds, are equivalent to the condition that the Ricci tensor is parallel. This condition, which is stronger than the field equations, is studied in a purely symplectic framework.
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