Kazhdan-Lusztig combinatorics in the moment graph setting

preprint2012arXivOpen access

Abstract

Motivated by a question on the graded rank of the stalks of the canonical sheaf on a Bruhat graph, we lift some equalities concerning (parabolic) Kazhdan-Lusztig polynomials to this moment graph setting. Our proofs hold also in positive characteristic, under some technical assumptions.

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