• Séminaire

Séminaire LaCIM «Graph Associahedra and the Poset of Maximal Tubings»

Conférencier: Emily Barnard (Northeastern University)


Abstract: Given a graph G on n vertices, Postnikov defined a graph associahedron PG as an example of a generalized permutohedron, a polytope whose normal fan coarsens the braid arrangement. Combinatorially, each face of  PG corresponds to certain collections of compatible subgraphs of G called tubings. Graph associahedra were introduced independently by Carr and Devadoss and by Davis, Januszkiewicz, and Scott. In this talk, we consider the poset obtained by orienting the one-skeleton of  PG according to a certain linear functional and its relationship to the weak order on Sn.

clockCreated with Sketch.Date / heure

vendredi 15 février 2019
13 h 30 à 14 h 30

pinCreated with Sketch.Lieu

UQAM - Pavillon Président-Kennedy (PK)
PK-4323
201, avenue du Président-Kennedy
Montréal (QC) H2X 2J6

personCreated with Sketch.Renseignements

Mots-clés

  • Recherche
  • Combinatoire
  • Mathématiques

Groupes

  • Département de mathématiques
  • Laboratoire de combinatoire et d'informatique mathématique (LaCIM)