Cautis–Logvinenko purity conjecture for objects on the G-Hilbert scheme

From papers

Let GG be a finite, non-abelian subgroup of SL(3,C)\operatorname{SL}(3,\mathbb{C}), let CC be the chamber defining G-Hilb(C3){G}\operatorname{-Hilb}(\mathbb{C}^3), and let SρS_\rho, LρL_\rho, and Ψ(Sρ)\Psi(S_\rho) be the objects and line bundle associated with a nontrivial representation ρ\rho of GG. Write ZρZ_\rho for the unstable locus of the wall CSρ\overline{C}\cap S_\rho^\perp. Cautis–Logvinenko's purity conjecture, with the wall description. The object Ψ(Sρ)\Psi(S_\rho) is a pure sheaf in degree 00 if and only if CSρ\overline{C}\cap S_\rho^\perp is a wall of the chamber CC, in which case

Ψ(Sρ)LρZρ.\Psi(S_\rho)\cong L_\rho^{\vee}\vert_{Z_\rho}.

This refines the cited conjecture that the objects Ψ(Sρ)\Psi(S_\rho) arising from nontrivial representations are pure sheaves. The proposed wall criterion and identification with the restriction to the unstable locus are motivated by Proposition 1.3 in the paper, but the parser supplies no evidence that the conjecture has been resolved.

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Sources & referencesView supporting material

Primary source

Raf Bocklandt, Alastair Craw and Alexander Quintero Velez, “Geometric Reid's recipe for dimer models”, arXiv:1305.0156 (2014).

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