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Covexillary Schubert varieties and Kazhdan-Lusztig Polynomials (2112.06337v5)
Published 12 Dec 2021 in math.AG, math.CO, and math.RT
Abstract: We establish combinatorial and inductive formulas for Kazhdan-Lusztig polynomials associated to covexillary elements in classical types, extending results of Boe, Lascoux-Sch\"{u}tzenberger, Sankaran-Vanchinathan, and Zelevinsky for Grassmannians of classical types. The proof uses intersection cohomology theory and the isomorphism of Kazhdan-Lusztig varieties from Anderson-Ikeda-Jeon-Kawago.