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arXiv · 2305.09396

On Chern classes of Lagrangian fibered hyper-K\"ahler manifolds

Claire Voisin
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Abstract

We study the rank stratification for the differential of a Lagrangian fibration over a smooth basis. We also introduce and study the notion of Lagrangian morphism of vector bundles. As a consequence, we prove some of the vanishing, in the Chow groups of a Lagrangian fibered hyper-K\"ahler variety $X$, of certain polynomials in the Chern classes of $X$ and the Lagrangian divisor, predicted by the Beauville-Voisin conjecture. Under some natural assumptions on the dimensions of the rank strata, we also establish nonnegativity and positivity results for Chern classes.

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Claire Voisin. 2023-05-16. On Chern classes of Lagrangian fibered hyper-K\"ahler manifolds. https://arxiv.org/abs/2305.09396

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