The twisted Fukaya-category conjecture for normal crossings surfaces

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Let XX be a proper normal crossings surface with graph-like singular locus described by a trivalent graph G(X)G(X) and orientable dual intersection complex. For each edge ee whose component CeC_e of the singular locus is isomorphic to P1\mathbb{P}^1, set

ne=−deg⁡(Sing(X))∣Ce.n_e=-\deg(\mathfrak{Sing}(X))|_{C_e}.

Let ZZ be a Riemann surface with a pants decomposition whose graph is G(X)G(X), and let P({ne})P(\{n_e\}) be the graded symplectic manifold obtained by the stated cut-and-reglue construction. Twisted Fukaya-category conjecture. There is an equivalence

DSing⁡(X)≃RFukgr(P({ne}),ΩZ).\operatorname{DSing}(X)\simeq \mathrm{RFuk}^{\mathrm{gr}}(P(\{n_e\}),\Omega_Z).

The right-hand category carries an autoequivalence Λ\Lambda and a natural isomorphism t:id→Λ−1[2]t:\mathrm{id}\to\Lambda^{-1}[2], giving a Λ\Lambda-twisted 22-periodic structure. This conjecturally extends the mirror description to nonzero degrees along the singular components.

References

Primary source

James Pascaleff and Nicolò Sibilla, “Singularity categories of normal crossings surfaces, descent, and mirror symmetry”, arXiv:2208.03896 (2022).

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