Relations conjecture for the affine-flag Springer fiber

Let Spq/p\textup{Sp}_{q/p} be the affine-flag Springer fiber, and let ϵ,ξ1,,ξp,e2,,ep\epsilon,\xi_1,\ldots,\xi_p,e_2,\ldots,e_p be the equivariant classes and parameters defined in the source. Let Iq/p(i)I^{(i)}_{q/p} be the ideals defined as kernels for the corresponding affine Grassmannian fibers, and let πi\pi_i^* denote the maps to HGm(Spq/p)\textup{H}^{*}_{\mathbb{G}_m}(\textup{Sp}_{q/p}). Relations conjecture. The kernel of the surjection

Q[ϵ,ξ1,,ξp,e2,,ep]HGm(Spq/p)\mathbb{Q}[\epsilon,\xi_1,\ldots,\xi_p,e_2,\ldots,e_p]\twoheadrightarrow \textup{H}^{*}_{\mathbb{G}_m}(\textup{Sp}_{q/p})

from the generation theorem is generated by πi(Iq/p(i))\pi_i^*(I^{(i)}_{q/p}) for i=1,,pi=1,\ldots,p. This conjecturally gives the defining relations for the equivariant cohomology ring; the source says only that a weak version is proved.

Sources & referencesView supporting material

Primary source

Alexei Oblomkov and Zhiwei Yun, “The cohomology ring of certain compactified Jacobians”, arXiv:1710.05391 (2017).

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