Kazhdan Lusztig Cells In Affine Weyl Groups With Unequal Parameters
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Kazhdan-Lusztig Cells in Affine Weyl Groups with Unequal Parameters
Author | : Jérémie Guilhot |
Publisher | : |
Total Pages | : 120 |
Release | : 2008 |
Genre | : Hecke algebras |
ISBN | : |
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Hecke algebras arise naturally in the representation theory of reductive groups over finite or p-adic fields. These algebras are specializations of Iwahori-Hecke algebras which can be defined in terms of a Coxeter group and a weight function without reference to reductive groups and this is the setting we are working in. Kazhdan-Lusztig cells play a crucial role in the study of Iwahori-Hecke algebras. The aim of this work is to study the Kazhdan-Lusztig cells in affine Weyl groups with unequal parameters. More precisely, we show that the Kazhdan-Lusztig polynomials of an affine Weyl group are invariant under ``long enough'' translations, we decompose the lowest two-sided cell into left cells and we determine the decomposition of the affine Weyl group of type G into cells for a whole class of weight functions.
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