2 papers
math.RA2007
L'algèbre des invariants d'un groupe de Coxeter agissant sur un mutiple de sa représentation standard
Loïc Foissy
Let G be a Coxeter group of type A_n, B_n, D_n or I_2(N), or a complex reflection group of type G(de,e,n). Let V be its standard representation and let k be an integer greater than…
math.QA2001
Les algebres de Hopf des arbres enracines decores
Loic Foissy
In \cite{Kreimer1,Connes,Broadhurst,Kreimer2}, a commutative, non cocommutative Hopf algebra H_R of (decorated) rooted trees was introduced. It is related to the Hopf algebra H_CM…