Strong formality conjecture for the unit-generated subcategories

From papers

Let XqX_q be the half-quantum flag variety, let N~\widetilde{\mathcal{N}} be the Springer resolution, let N\mathcal{N} be the nilpotent cone, and use QCohdg\operatorname{QCoh}_{\mathrm{dg}}, IndCohdg\operatorname{IndCoh}_{\mathrm{dg}}, and Repdg\operatorname{Rep}_{\mathrm{dg}} for the derived categories described in the source. Strong formality conjecture. There is a central, fully faithful, QCohdg(Gˇ/Bˇ)\operatorname{QCoh}_{\mathrm{dg}}(\check{G}/\check{B})-linear tensor functor

η:QCohdg(N~)IndCohdg(Xq),\eta^*:\operatorname{QCoh}_{\mathrm{dg}}(\widetilde{\mathcal{N}})\to\operatorname{IndCoh}_{\mathrm{dg}}(X_q),

which is an equivalence onto the localizing QCohdg(Gˇ/Bˇ)\operatorname{QCoh}_{\mathrm{dg}}(\check{G}/\check{B})-submodule generated by the unit. There is likewise a fully faithful tensor functor

ηˉ:QCohdg(N)Repdg(u(Gq)),\bar{\eta}^*:\operatorname{QCoh}_{\mathrm{dg}}(\mathcal{N})\to\operatorname{Rep}_{\mathrm{dg}}(u(G_q)),

which is an equivalence onto the localizing subcategory generated by the unit. This is the detailed unit-generated formulation of the strong formality conjecture and implies the corresponding monoidal relationship between the Springer resolution and the small quantum group.

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Sources & referencesView supporting material

Primary source

Cris Negron and Julia Pevtsova, “The half-quantum flag variety and representations for small quantum groups”, arXiv:2212.12198 (2022).

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