Isometry Mathematics
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1. Reflexões e numero de cobertura de arvores homogeneas e grupos de automorfismos de arvores semi-homogeneas
Let G be a homogeneous tree and Aut(G) its group of automorphism. An automorphism Î Aut(G) is said to be even if d(f(x),x) º0 mod 2 for every vertex x Î G of , where d(.,.) is the canonical distance function defined by the minimum length of paths connecting the vertices. The set Aut+(G) of all even automorphism is a subgroup of index 2 in Aut(G). We defin
Publicado em: 2006