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Twisted Polytope Sheaves and Coherent-Constructible Correspondence for Toric Varieties

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abstract

Given a smooth projective toric variety $X_\Sigma$ of complex dimension $n$, Fang-Liu-Treumann-Zaslow \cite{FLTZ} showed that there is a quasi-embedding of the differential graded (dg) derived category of coherent sheaves $Coh(X_\Sigma)$ into the dg derived category of constructible sheaves on a torus $Sh(T^n, \Lambda_\Sigma)$. Recently, Kuwagaki \cite{Ku2} proved that the quasi-embedding is a quasi-equivalence, and generalized the result to toric stacks. Here we give a different proof in the smooth projective case, using non-characteristic deformation of sheaves to find twisted polytope sheaves that co-represent the stalk functors.

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2024 1

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Line Bundle Resolutions via the Coherent-Constructible Correspondence

math.AG · 2024-11-26 · accept · novelty 6.0

On smooth projective toric varieties, every coherent sheaf has a minimal line bundle resolution of length at most the dimension, and for toric subvarieties the Betti numbers are compactly supported cohomology groups of mirror-torus strata.

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  • Line Bundle Resolutions via the Coherent-Constructible Correspondence math.AG · 2024-11-26 · accept · none · ref 17 · internal anchor

    On smooth projective toric varieties, every coherent sheaf has a minimal line bundle resolution of length at most the dimension, and for toric subvarieties the Betti numbers are compactly supported cohomology groups of mirror-torus strata.