The coherent-constructible correspondence for smooth complete fans

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Let MM be a free abelian group of rank nn, let NN be its dual, and let Σ\Sigma be a smooth complete fan in N\bR:=N⊗\bZ\bRN_\bR:=N\otimes_\bZ\bR. Let XΣX_\Sigma be the associated smooth toric variety, set Tn:=M\bR/MT^n:=M_\bR/M, and define

ΛΣ:=⋃σ∈Σp(σ⊥)×(−σ)⊂T∗Tn,\Lambda_\Sigma:=\bigcup_{\sigma\in\Sigma}p(\sigma^\perp)\times(-\sigma)\subset T^*T^n,

where p:M\bR→Tnp:M_\bR\to T^n is the quotient map. Let κΣ:Coh⁡(XΣ)→Sh⁡ΛΣc(Tn)\kappa_\Sigma:\operatorname{Coh}(X_\Sigma)\to\operatorname{Sh}^c_{\Lambda_\Sigma}(T^n) be the fully faithful morphism to the dg category of constructible sheaves whose microsupports are contained in ΛΣ\Lambda_\Sigma. The coherent-constructible correspondence. The morphism κΣ\kappa_\Sigma induces a quasi-equivalence of dg categories.

This is the coherent-constructible correspondence formulated by Fang–Liu–Treumann–Zaslow; its equivariant version was proved by them. The claim is known when Σ\Sigma is cragged or has dimension 22, while the general smooth complete case remains open.

References

Primary source

Yuichi Ike and Tatsuki Kuwagaki, “Categorical localization for the coherent-constructible correspondence”, arXiv:1609.01177 (2019).

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