Bases for the BruhatβChevalley Order on
β
Meinolf Geck; Sungsoon Kim
π
Article
π
1997
π
Elsevier Science
π
English
β 403 KB
Let W, S be any finite Coxeter system and F the BruhatαChevalley Ε½ . Ε½ . order on W. We denote by Base W and BiGr W the base and the set of all bi-grassmannians, respectively. For s, t g S we let s W t be the subset of Ε½ . Ε½ . Γ 4 Ε½ . Γ 4 BiGr W consisting of all w g W such that L L w s s and R R w