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Original Articles

Générateurs et Certaines Relations D'une Algèbre Pré-Lie sur les Arbres Enracinés

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Pages 4033-4045 | Received 10 Apr 2012, Published online: 25 Aug 2013
 

Abstract

Soit K un corps de caractéristique zéro. Une algèbre pré-Lie à gauche est un K-espace vectoriel muni d'un produit ○ tel que X ○ (YZ) − (XY) ○ Z = Y ○ (XZ) − (YX) ○ Z. Dans cet article, on construit un produit noté ▹ sur l'espace vectoriel 𝒯′ engendré par les arbres enracinés qui contiennent au moins une arête: On montre tout d'abord que (𝒯′, ▹) est une algèbre pré-Lie à gauche engendrée par deux générateurs. Puis on montre que cette algèbre n'est pas libre en donnant deux familles non triviales de relations.

In this paper, K is a field of characteristic zero. A left pre-Lie algebra is a K-vector space with product ○ such that X ○ (YZ) − (XY) ○ Z = Y ○ (XZ) − (YX) ○ Z. In this paper, we construct a product denoted by ▹ on the vector space 𝒯′ spanned by the rooted trees :we show first that (𝒯′, ▹) is a pre-Lie algebra spanned by two generators. Finally, we show that the pre-lie algebra (𝒯′, ▹) is not free, by giving two families of relations.

Classification MSC (2000):

Notes

Communicated by A. Elduque.

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