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arXiv · 1008.3108

Antisymplectic involutions of holomorphic symplectic manifolds

Arnaud Beauville
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Abstract

Let X be a holomorphic symplectic manifold, of dimension divisible by 4, and s an antisymplectic involution of X . The fixed locus F of s is a Lagrangian submanifold of X ; we show that its Â-genus is 1. As an application, we determine all possibilities for the Chern numbers of F when X is a deformation of the Hilbert square of a K3 surface.

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Arnaud Beauville. 2010-12-08. Antisymplectic involutions of holomorphic symplectic manifolds. https://doi.org/10.1112/jtopol%2Fjtr002

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