Kazhdan–Lusztig polynomials and subexpressions
2021
Abstract We refine an idea of Deodhar, whose goal is a counting formula for Kazhdan–Lusztig polynomials. This is a consequence of a simple observation that one can use the solution of Soergel's conjecture to make ambiguities involved in defining certain morphisms between Soergel bimodules in characteristic zero (double leaves) disappear.
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