Séminaire Lotharingien de Combinatoire, 91B.37 (2024), 11 pp.
Yibo Gao, Reuven Hodges and Alexander Yong
Levi-Spherical Varieties and Demazure Characters
Abstract.
We prove a short, root-system uniform, combinatorial classification of Levi-spherical Schubert varieties for any generalized flag variety $G/B$ of finite Lie type.
We apply this to the study of multiplicity-free decompositions of Demazure modules and their characters.
Received: November 15, 2023.
Accepted: February 15, 2024.
Final version: April 1, 2024.
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