The Symplectic Structure of N=2 Supergravity and its Central Extension

Abstract

We report on the formulation of $N=2$ $D=4$ supergravity coupled to $n_V$ abelian vector multiplets in presence of electric and magnetic charges. General formulae for the (moduli dependent) electric and magnetic charges for the $n_V+1$ gauge fields are given which reflect the symplectic structure of the underlying special geometry. The specification to Type IIB strings compactified on Calabi-Yau manifolds, with gauge group $U(1{)}^{h_{21}+1}$ is given.

arXiv commentContribution to the Proceedings of Trieste Conference on ``S Duality and Mirror Symmetry'', June 1995. LaTeX with espcrc2.sty (attached), 9 pgs

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