Journée-séminaire de combinatoire

(équipe CALIN du LIPN, université Paris-Nord, Villetaneuse)

Le 21 février 2012 à 10h30 en B311, Gérard H. E. Duchamp nous parlera de : Ordered infinite products in analysis and combinatorial applications (3/3)

Résumé : We continue our exploration of the combinatorics of groups.
Function spaces are used in order to dualize the product : typically the algebraic dual of the group algebra k[G] is the full function space kG. In many cases, given a function φ∈ kG, there exists no nice formula for φ(fg).
But, if we restrict φ to some subspaces, the expression of φ(fg) can be nicely split. Examples will be taken in : Faà di Bruno formula, Free group, Noncommutative Symmetric function. If time permits, we will treat some points of the theory of deformation and some combinatorial aspects of quantum groups.


Dernière modification : Monday 27 May 2024 Valid HTML 4.01! Valid CSS! Contact pour cette page : Cyril.Banderier at lipn.univ-paris13.fr