Semi-continuité des cellules de Kazhdan-Lusztig

Representations of reductive groups and Lie algebras Geometry of flag varieties (intersection cohomology)

Un crit`ere agr´eable permet de v´erifier si deux ´el´ements de S n sont dans la mˆeme cellule : c’est la correspondance de Robinson-Schensted (voir [Fu] pour un expos´e

In the case of the symmetric group, the partition into left cells (obtained by Kazh- dan and Lusztig [7, Theorem 1.4]) uses the Robinson-Schensted correspondence, and the key tool is

After two sections devoted to recollections of well-known facts about Hecke algebras and Kazhdan-Lusztig theory with unequal parameters, we shall state our main conjecture in the

[r]

Objectifs : Nombre dérivé d’une fonction en un point (comme limite du taux d’accroissement). Lecture graphique du coefficient directeur d’une tangente à la courbe

Exercice 1 (Question de cours).. c) Deux formes ´ equivalentes ont mˆ eme rang car le rang se lit sue la matrice.. On donne des r´ eponses. Soit X, Y, Z les coordonn´ ees de P, Q, R

Finally, we point out that our conjecture also makes sense for arbitrary Coxeter groups. It can be checked easily that it holds in the infinite dihedral case; it also follows from