Categorical braid group actions and cactus groups
Categorical braid group actions and cactus groups
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分类辫子组动作和仙人掌组
DOI:
10.1016/j.aim.2023.109190
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发表时间:
2023
影响因子:
1.7
通讯作者:
Yacobi, Oded
中科院分区:
文献类型:
--
作者:
Halacheva, Iva;Licata, Anthony;Losev, Ivan;Yacobi, Oded
Let g be a semisimple simply-laced Lie algebra of finite type. Let C be an abelian categorical representation of the quantum group U q (g) categorifying an integrable representation V. The Artin braid group B of g acts on D b (C) by Rickard complexes, providing a triangulated equivalence Θ w 0: D b (C μ)→ D b (C w 0 (μ)) where μ is a weight of V, and Θ w 0 is a positive lift of the longest element of the Weyl group. We prove that this equivalence is t-exact up to shift when V is isotypic, generalising a fundamental result of Chuang and Rouquier in the case g= sl 2. For general V, we prove that Θ w 0 is a perverse equivalence with respect to a Jordan-Hölder filtration of C. Using these results we construct, from the action of B on V, an action of the cactus group on the crystal of V. This recovers the cactus group action on V defined via generalised Schützenberger involutions, and provides a new connection between categorical representation theory and crystal bases. We also use these results to give new proofs of theorems of Berenstein-Zelevinsky, Rhoades, and Stembridge regarding the action of symmetric group on the Kazhdan-Lusztig basis of its Specht modules.
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DOI:
10.1016/j.jcta.2009.03.017
发表时间:
2010
期刊:
J. Comb. Theory A
影响因子:
--
作者:
B. Rhoades
通讯作者:
B. Rhoades
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
A. Berenstein;A. Zelevinsky
通讯作者:
A. Zelevinsky
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
David A. Craven;R. Rouquier
通讯作者:
R. Rouquier
影响因子:
0.8
作者:
J. Kamnitzer;P. Tingley
通讯作者:
P. Tingley
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
J. Chuang
通讯作者:
J. Chuang