ACTION OF NON ABELIAN GROUP GENERATED BY AFFINE HOMOTHETIES ON R^n

Adlene Ayadi (1) , Yahya N'Dao (1)

1 Systèmes dynamiques et combinatoire:99UR15-15

In this paper, we study the action of non abelian group G generated by affine homotheties on R^n. We prove that G satisfies one of the following properties: (i) there exist a subgroup F_{G} of R\{0} containing 0 in its closure, a G-invariant affine subspace E_{G} of R^n and a in E_{G} such that for every x in R^n the closure of the orbit G(x) is equal to F_{G} .(x − a) +E_{G}. In particular, G(x) is dense in E_{G} for every x in E_{G} and every orbit of U = R^n\E_{G} is minimal in U. (ii) there exists a closed subgroup H_{G} of R^n and a in R^n such that for every x in R^n, the closure of the orbit G(x) is equal to the union of (x + H_{G}) and (−x + a + H_{G}).

Mots clés: Homothety; orbit; density; minimal; non abelian; action; dynamic.; dynamic

Domaines: Systèmes dynamiques [math.DS]

Adlene Ayadi, Yahya N'Dao. ACTION OF NON ABELIAN GROUP GENERATED BY AFFINE HOMOTHETIES ON R^n. hal-00521493, version2, 2010, pp.hal-00521493. ⟨hal-00521811v2⟩