Quantum generalized Springer decomposition conjecture

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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.

References

Primary source

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

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