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arXiv · 1907.06420

Lefschetz section theorems for tropical hypersurfaces

Charles Arnal·Arthur Renaudineau·Kristin Shaw
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Abstract

We establish variants of the Lefschetz hyperplane section theorem for the integral tropical homology groups of tropical hypersurfaces of toric varieties. It follows from these theorems that the integral tropical homology groups of non-singular tropical hypersurfaces which are compact or contained in $\mathbb{R}^n$ are torsion free. We prove a relationship between the coefficients of the $χ_y$ genera of complex hypersurfaces in toric varieties and Euler characteristics of the integral tropical cellular chain complexes of their tropical counterparts. It follows that the integral tropical homology groups give the Hodge numbers of compact non-singular hypersurfaces of complex toric varieties. Finally for tropical hypersurfaces in certain affine toric varieties, we relate the ranks of their tropical homology groups to the Hodge-Deligne numbers of their complex counterparts.

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Charles Arnal, Arthur Renaudineau, Kristin Shaw. 2019-07-15. Lefschetz section theorems for tropical hypersurfaces. https://doi.org/10.5802/ahl.104

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