The coherent-constructible correspondence for smooth complete fans

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:=σΣp(σ)×(σ)TTn,\Lambda_\Sigma:=\bigcup_{\sigma\in\Sigma}p(\sigma^\perp)\times(-\sigma)\subset T^*T^n,

where p:M\bRTnp:M_\bR\to T^n is the quotient map. Let κΣ:Coh(XΣ)ShΛΣc(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.

Sources & referencesView supporting material

Primary source

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

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.