Construction of Ricci-type connections by reduction and induction

Details Construction of Ricci-type connections by reduction and induction Construction of Ricci-type connections by reduction and induction

2003-10-23

arxiv.org/abs/math/0310375v1

Mathematics

Differential Geometry

Scientific paper

Given the Euclidean space $\R^{2n+2}$ endowed with a constant symplectic structure and the standard flat connection, and given a polynomial of degree 2 on that space, Baguis and Cahen have defined a reduction procedure which yields a symplectic manifold endowed with a Ricci-type connection. We observe that any symplectic manifold of dimension greater than 2 endowed with a symplectic connection of Ricci-type is locally given by a local version of such a reduction. We also consider the reverse of this reduction procedure, an induction procedure: we construct globally on a symplectic manifold endowed with a connection of Ricci-type $(M,\omega,\nabla)$ a circle or a line bundle which embeds in a flat symplectic manifold $(P,\mu ,\nabla^1)$ as the zero set of a function whose third covariant derivative vanishes, in such a way that $(M,\omega,\nabla)$ is obtained by reduction from $(P,\mu ,\nabla^1)$. We further develop the particular case of symmetric symplectic manifolds with Ricci-type connections.

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