Quantum generalized Springer decomposition conjecture

Let GG be a connected reductive group. A q\mathtt{q}-cuspidal datum is a GG-conjugacy class of pairs (L,C)(L,C), where LL is an elliptic-pseudo Levi subgroup of GG and CC is a simple unipotent cuspidal Dq(L){\mathcal D_\mathtt{q}(L)}-module. Let Z(L)Z(L)^\circ denote the identity component of the center of LL. Quantum generalized Springer conjecture. The category Dq(G)-modGstrG{\mathcal D}_q(G)\textrm{-mod}_G^{str}{G} has a finite block decomposition indexed by the set of q\mathtt{q}-cuspidal data; moreover, the block corresponding to (L,C)(L,C) is equivalent to the category of modules for the smash product of Dq(Z(L))\mathcal D_\mathtt{q}(Z(L)^\circ) with a twisted group algebra of a certain finite group. This is presented as the q\mathtt{q}-analogue of Theorem A cited in the source. The source further notes that proving it requires quantum Springer theory and parabolic induction and restriction functors.

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Primary source

Sam Gunningham, David Jordan and Monica Vazirani, “Quantum Character Theory”, arXiv:2309.03117 (2023).

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