Résumé : After having recalled and proved the set of "marvelous identities" evoked last week through an Umbral coding of "the plane", we construct, after Minh's work, a regularized character of the stuffle algebra which transports, point-by-point the Hausdorff group of the stuffle algebra. We provide as well the $q$-analogue and set some open questions.
Dernière modification : Thursday 21 November 2024 | Contact pour cette page : Cyril.Banderier at lipn.univ-paris13.fr |