Kleinian singularity classification conjecture for full-support Harish-Chandra bimodules

Let Y=C2/ΓY=\mathbb{C}^2/\Gamma, where Γ\Gamma is a finite subgroup of SL2(C)\operatorname{SL}_2(\mathbb{C}), and let hΓ\mathfrak{h}_\Gamma^* be the Cartan space associated with the ADE type of Γ\Gamma. For c(CΓ)1Γc\in (\mathbb{C}\Gamma)_1^\Gamma, let λchΓ\lambda_c\in\mathfrak{h}_\Gamma^* be the corresponding quantization parameter, and write WΓa=WΓΛrW^a_\Gamma=W_\Gamma\ltimes\Lambda_r for the affine Weyl group, where Λr\Lambda_r is the root lattice. A full-support Harish-Chandra bimodule means an irreducible Harish-Chandra bimodule whose associated variety is all of YY. Kleinian full-support classification conjecture. For each c(CΓ)1Γc\in(\mathbb{C}\Gamma)_1^\Gamma, there is a minimal normal subgroup ΓcΓ\Gamma_c\subset\Gamma such that WΓaλcW^a_\Gamma\lambda_c contains λc\lambda_{c'} with cCΓcCΓc'\in\mathbb{C}\Gamma_c\subset\mathbb{C}\Gamma. The irreducible Harish-Chandra Aλc\mathcal{A}_{\lambda_c}-bimodules with full support are in bijection with the irreducible representations of Γ/Γc\Gamma/\Gamma_c. This conjectural classification would determine the full-support Harish-Chandra bimodules for quantizations of Kleinian singularities; the source gives no resolution status for the claims.

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Primary source

Ivan Losev, “Harish-Chandra bimodules over quantized symplectic singularities”, arXiv:1810.07625 (2020).

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