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arXiv · 2207.08446

Symplectic cacti, virtualization and Berenstein-Kirillov groups

Olga Azenhas·Mojdeh Tarighat Feller·Jacinta Torres
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Abstract

We explicitly realize an internal action of the symplectic cactus group, recently defined by Halacheva for any complex, reductive, finite-dimensional Lie algebra, on crystals of Kashiwara-Nakashima tableaux. Our methods include a symplectic version of jeu de taquin due to Sheats and Lecouvey, symplectic reversal, and virtualization due to Baker. As an application, we define and study a symplectic version of the Berenstein-Kirillov group and show that it is a quotient of the symplectic cactus group. In addition two relations for symplectic Berenstein-Kirillov group are given that do not follow from the defining relations of the symplectic cactus group.

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Olga Azenhas, Mojdeh Tarighat Feller, Jacinta Torres. 2022-07-18. Symplectic cacti, virtualization and Berenstein-Kirillov groups. https://arxiv.org/abs/2207.08446

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