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Abelian simply transitive affine groups of symplectic type

Oliver Baues, Vicente Cortes

math.DGarXiv:math/0105025

Abstract

We construct a model space C((2n)) for the variety of Abelian simply transitive groups of affine transformations of type Sp(2n). The model is stratified and its principal stratum is a Zariski-open subbundle of a natural vector bundle over the Grassmannian of Lagrangian subspaces in 2n. Next we show that every flat special Kähler manifold may be constructed locally from a holomorphic function whose third derivatives satisfy some algebraic constraint. In particular global models for flat special Kähler manifolds with constant cubic form correspond to a subvariety of C((2n)).

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