Integral cocenter isomorphism conjecture for the Gieseker variety

Let R\mathcal{R} be the coefficient ring, let Ploc=P⊗RFrac⁡RP_{\mathrm{loc}}=P\otimes_{\mathcal{R}}\operatorname{Frac}\mathcal{R} for every R\mathcal{R}-module PP, and let

KT(L(n,r))loc≃Tr⁡(Hn,r)locK_{\mathcal{T}}(\mathcal{L}(n,r))_{\mathrm{loc}}\simeq \operatorname{Tr}({\bf H}_{n,r})_{\mathrm{loc}}

be the unique isomorphism of Z(Hn,r)locZ({\bf H}_{n,r})_{\mathrm{loc}}-modules intertwining the specified pairings and maps. Integral cocenter isomorphism conjecture. This isomorphism induces the isomorphism

KT(L(n,r))≃Tr⁡(\Heckn,r)K_{\mathcal{T}}(\mathcal{L}(n,r))\simeq \operatorname{Tr}(\Heck_{n,r})

of Z(\Heckn,r)Z(\Heck_{n,r})-modules. The conjecture asserts that the localized identification descends to the unlocalized equivariant KK-theory and cocenter; its resolution is not specified in the supplied text.

References

Primary source

Vasily Krylov, Raphaël Paegelow and Pavel Shlykov, “K-theory of Gieseker variety and type A cyclotomic Hecke algebra”, arXiv:2605.11579 (2026).

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