Derived Reid's recipe conjecture for consistent dimer models

Let Q0Q_0 be the vertex set of the dual quiver, let θ\theta be a generic stability parameter, and let θ\theta denote the corresponding moduli space with fan Σθ\Sigma_\theta. For a nonzero vertex iQ0i\in Q_0, let Ψθ(Si)\Psi_\theta(S_i) be the associated derived object and write F:=H1(Ψθ(Si))\mathcal{F}:=H^{-1}(\Psi_\theta(S_i)). Interior line segments τΣθ(2)\tau\in\Sigma_\theta(2) and lattice points ρΣθ(1)\rho\in\Sigma_\theta(1) are marked by vertices according to the combinatorial Reid's recipe. Derived Reid's recipe conjecture. For every nonzero vertex iQ0i\in Q_0, F0\mathcal{F}\neq 0 if and only if ii marks two or more interior line segments in Σθ\Sigma_\theta. In that case, the support of Ψθ(Si)\Psi_\theta(S_i) is the union of all torus-invariant divisors DρD_\rho such that two line segments τ\tau in Σθ\Sigma_\theta containing ρ\rho are marked by ii. This would complete the description of the supports of the derived objects associated to nonzero vertices, extending the cases where a vertex marks lattice points or a unique line segment; the conjecture is presented as open in the source.

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Primary source

Alastair Craw, Liana Heuberger and Jesus Tapia Amador, “Combinatorial Reid's recipe for consistent dimer models”, arXiv:2001.07506 (2021).

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