IJPAM: Volume 36, No. 2 (2007)

ON THE COADJOINT REPRESENTATION OF THE AFFINE
GROUP BY THE METHOD OF VECTOR ENVELOPES

A. Ouadfel
Département de Mathématiques
École Nationale des Sciences Appliquées
B.P. 473, Oujda, MOROCCO
e-mail: ali_ouadfel@yahoo.fr


Abstract.The existence for any affine space A over a field $\mathbb{K}$ of a pair $(\hat A,\varphi)$, termed the vector envelope of $\vec{A}$, and consisting of a vector space $\vec A$ and an affine transformation $\varphi$ from $A$ to $\hat A$, can be used to identify $A$ (respectively the associated vector space $\vec A$) with an affine hyperplane of $\hat A$ (respectively with a vector hyperplane of $\hat A$). In this article, an attempt is made, using the concept of vector envelope of an affine space, to characterize the elements of the Lie algebra dual of the Lie group of the open-orbit affine transformations for the coadjoint representation.

Received: November 11, 2006

AMS Subject Classification: 22E60, 17B45, 14L35

Key Words and Phrases: affine space, affine group, vector envelope, coadjoint orbit

Source: International Journal of Pure and Applied Mathematics
ISSN: 1311-8080
Year: 2007
Volume: 36
Issue: 2