Beiträge zur Algebra und Geometrie Contributions to Algebra and Geometry Vol. 45, No. 2, pp. 465479 (2004) 

A symplectic reduction for pseudoRiemannian manifolds with compatible almost product structuresJerzy J. KonderakDipartimento di Matematica Universit{à} di Bari, Via Orabona 4, 70125 Bari, Italy, email: konderak@dm.uniba.itAbstract: We consider a manifold $M$ with a pseudoRiemannian metric $g$ and an almost product structure $P$ such that $g(P(X),P(Y))=g(X,Y)$. We suppose that the almost product structure $P$ is parallel with respect to the LeviCivita connection of $g$. These induce a natural symplectic structure on $M$. We consider an isometric action of a Lie group $G$ on $M$ preserving the pseudoRiemannian metric and the almost product structure $P$. Then we prove a symplectic reduction theorem for such manifolds. We obtain a reduced manifold with a pseudoRiemannian metric and a parallel almost product structure. Keywords: symplectic manifold, almost product structure, symplectic reduction, paraKähler manifold, Lagrangian foliation Classification (MSC2000): 53D20, 53C15 Full text of the article:
Electronic version published on: 9 Sep 2004. This page was last modified: 4 May 2006.
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