| HAL : hal-00578537, version 2 |
| arXiv : 1103.4025 |
| Fiche détaillée | Récupérer au format |
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| Versions disponibles : | v1 (21-03-2011) | v2 (19-04-2011) |
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| Asymptotic lowest two-sided cell |
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| Cédric Bonnafé 1Jérémie Guilhot 2 |
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| (21/03/2011) |
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| To a Coxeter system $(W,S)$ (with $S$ finite) and a weight function $L : W \to \NM$ is associated a partition of $W$ into Kazhdan-Lusztig (left, right or two-sided) $L$-cells. Let $S^\circ = \{s \in S~|~L(s)=0\}$, $S^+=\{s \in S~|~L(s) > 0\}$ and let $C$ be a Kazhdan-Lusztig (left, right or two-sided) $L$-cell. According to the semicontinuity conjecture of the first author, there should exist a positive natural number $m$ such that, for any weight function $L' : W \to \NM$ such that $L(s^+)=L'(s^+) > m L'(s^\circ)$ for all $s^+ \in S^+$ and $s^\circ \in S^\circ$, $C$ is a union of Kazhdan-Lusztig (left, right or two-sided) $L'$-cells. The aim of this paper is to prove this conjecture whenever $(W,S)$ is an affine Weyl group and $C$ is contained in the lowest two-sided $L$-cell. |
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| 1 : | Institut de Mathématiques et de Modélisation de Montpellier (I3M) |
| CNRS : UMR5149 – Université Montpellier II - Sciences et Techniques du Languedoc | |
| 2 : | School of Mathematics |
| University of East Anglia | |
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| Domaine | : | Mathématiques/Théorie des représentations Mathématiques/Théorie des groupes |
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| Kazhdan-Lusztig cells – affine Weyl groups – unequal parameters – lowest two-sided cell – semicontinuity |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00578537, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00578537 | |
| oai:hal.archives-ouvertes.fr:hal-00578537 | |
| Contributeur : Cédric Bonnafé | |
| Soumis le : Lundi 18 Avril 2011, 13:27:26 | |
| Dernière modification le : Mardi 19 Avril 2011, 09:32:07 | |