Strong formality conjecture for the unit-generated subcategories

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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 QCoh⁡dg\operatorname{QCoh}_{\mathrm{dg}}, IndCoh⁡dg\operatorname{IndCoh}_{\mathrm{dg}}, and Rep⁡dg\operatorname{Rep}_{\mathrm{dg}} for the derived categories described in the source. Strong formality conjecture. There is a central, fully faithful, QCoh⁡dg(Gˇ/Bˇ)\operatorname{QCoh}_{\mathrm{dg}}(\check{G}/\check{B})-linear tensor functor

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

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

ηˉ∗:QCoh⁡dg(N)→Rep⁡dg(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.

References

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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