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math.QA2005
On the Coxeter transformations for Tamari posets
Frederic Chapoton
On obtient une relation entre la transformation de Coxeter agissant sur le groupe de Grothendieck de la categorie derivee des modules sur un poset de Tamari d'une part et la struct…
math.QA2004
Pointed and multi-pointed partitions of type A and B
Frederic Chapoton, Bruno Vallette
The aim of this paper is to define and study pointed and multi-pointed partition posets of type A and B (in the classification of Coxeter groups). We compute their characteristic p…