Fukaya-category matrix-factorization conjecture for a one-critical-value Landau–Ginzburg model

Let (X,f:XC)(X,f:X\to\mathbb{C}) be a Landau–Ginzburg Weinstein sector such that ff has no critical values outside 00, and let FF be a general fiber of ff. Let W(X,f)\mathcal{W}(X,f) and W(F)\mathcal{W}(F) denote the corresponding wrapped Fukaya categories, and let X\mathcal{X}^\circ denote the very affine part of XX. The cup functor has a right adjoint cap, and its monad is presented as

capcup=Cone(μ1sidW(F)).\operatorname{cap}\operatorname{cup}=\operatorname{Cone}(\mu^{-1}\xrightarrow{s}\operatorname{id}_{\mathcal{W}(F)}).

Let s~HH0(W(X,fX))\widetilde{s}\in HH^0(\mathcal{W}(\mathcal{X}^\circ,f|_{\mathcal{X}^\circ})) be the Hochschild class induced by ss. Fukaya-category matrix-factorization conjecture. There is an equivalence

W(X,f)MF(W(X,fX),s~).\mathcal{W}(X,f)\cong\operatorname{MF}(\mathcal{W}(\mathcal{X}^\circ,f|_{\mathcal{X}^\circ}),\widetilde{s}).

This formalizes a procedure for computing the Fukaya–Seidel category of a Landau–Ginzburg model with a single critical value; the source notes that it is expected in general and easy to prove in several cases, but leaves the complete statement as a conjecture.

Sources & referencesView supporting material

Primary source

Benjamin Gammage, “Mirror symmetry for Berglund-Hübsch Milnor fibers”, arXiv:2010.15570 (2024).

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