Rush–Shi's cyclic sieving conjecture for exceptional minuscule posets

Let PP be one of the two minuscule posets associated to an exceptional Lie algebra of type EE, and let kZ0k\in\mathbb{Z}_{\geq 0}. Write PPk(P){\mathsf{PP}}^k(P) for the plane partitions of height at most kk over PP, let Ψ\Psi denote rowmotion on this set, and let fPk(q)=IPPk(P)qIf_P^k(q)=\sum_{\mathcal{I}\in{\mathsf{PP}}^k(P)}q^{|\mathcal{I}|}. Rush–Shi's conjecture. The polynomial fPkf_P^k is a cyclic sieving polynomial for the action of Ψ\Psi on PPk(P){\mathsf{PP}}^k(P). This extends the cyclic sieving phenomenon previously known for minuscule plane partitions of height at most 22 to the exceptional type EE cases for every nonnegative height.

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Primary source

Holly Mandel and Oliver Pechenik, “Orbits of Plane Partitions of Exceptional Lie Type”, arXiv:1712.09180 (2018).

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