Ishii's maximal-resolution conjecture for quotient surface resolutions

Let GGL2(C)G\subset GL_2({\mathbb{C}}) be any finite subgroup, and let XX be a resolution of C2/G\mathbb{C}^2/G. Let YY be the maximal resolution of the pair (C2/G,B)(\mathbb{C}^2/G,B), where BB is the boundary divisor determined by the quotient. Ishii's conjecture. The resolution XX is dominated by YY if and only if

XMθX\cong M_{\theta}

for some generic θΘ(G)\theta\in\Theta(G). This extends the Craw--Ishii conjecture from the crepant to the non-crepant setting; the formulation concerns which resolutions arise as moduli spaces of stable representations, while the status of the conjecture is not specified in the source.

Sources & referencesView supporting material

Primary source

Shu Nimura, “Ishii's conjecture and Bridgeland stability conditions for dihedral reflection groups”, arXiv:2605.22474 (2026).

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