Complex Lagrangians in a hyperKaehler manifold and the relative Albanese
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2020
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Let M be the moduli space of complex Lagrangian submanifolds of a hyperKähler manifold X, and let A→ M be the relative Albanese over M. We prove that A has a natural holomorphic symplectic structure. The projection onto M defines a completely integrable structure on the symplectic manifold A. In particular, the fibers are complex Lagrangians with respect to the symplectic form on A. We also prove analogous results for the relative Picard over M.
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research subject categories , mathematics , algebra , geometry and mathematical analysis