The torus 3D B-model Fukaya–IndCoh equivalence conjecture

Let TT be a torus, let t\mathfrak{t} be its Lie algebra, and let TCT^{\vee}_{\mathbb{C}} be the complex dual torus. Let BFM(T)\mathrm{BFM}(T^{\vee}) denote the associated BFN space. Torus Fukaya–IndCoh equivalence conjecture. There is an equivalence of 22-categories

2Fuk([t/T])IndCohShvCat(TC),{}^{2}\mathrm{Fuk}([\mathfrak{t}^{*}/T])\simeq \mathrm{IndCohShvCat}(T^{\vee}_{\mathbb{C}}),

and the Hochschild cohomology 11-categories of these 22-categories are equivalent to

QCoh(BFM(T)).\operatorname{QCoh}(\mathrm{BFM}(T^{\vee})).

This is proposed as an identification of the shifted Fukaya-theoretic and Ind-coherent models for the 3D B-model in the torus case; the conjecture remains open.

Sources & referencesView supporting material

Primary source

James Pascaleff and Nicolò Sibilla, “Speculations on higher Fukaya categories”, arXiv:2503.20906 (2025).

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