The moduli space of complex Lagrangian submanifolds

Details The moduli space of complex Lagrangian submanifolds The moduli space of complex Lagrangian submanifolds

1999-01-18

arxiv.org/abs/math/9901069v1

Asian J. Math 3 (1999) 77-91

Mathematics

Differential Geometry

18 pages

Scientific paper

Following an earlier paper on the differential-geometric structure of the moduli space of special Lagrangian submanifolds in a Calabi-Yau manifold, we follow an analogous approach for compact complex Lagrangian submanifolds of a (K\"ahlerian) complex symplectic manifold. The natural geometric structure on the moduli space is a special K\"ahler metric, but we offer a different point of view on the local differential geometry of these, based on the structure of a submanifold of $V\times V$ (where $V$ is a symplectic vector space) which is Lagrangian with respect to two constant symplectic forms. As an application, we show using this point of view how the hyperk\"ahler metric of Cecotti, Ferrara and Girardello associated to a special K\"ahler structure fits into the Legendre transform construction of Lindstr\"om and Ro\v cek.

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