Heteroclinic cycles and wreath product symmetries

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

dias, aps (Autor) FCUP; dionne, b (Autor) Outra; stewart, i (Autor) Outra

Revista

Título: Dynamics and Stability of Systems

Vol. 15

Páginas: 353-385

ISSN: 0268-1110

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 6 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Matemática

Outras Informações

ID Authenticus: P-000-Y8M

DOI: 10.1080/713603760

Abstract (EN): We consider the existence and stability of heteroclinic cycles arising by local bifurcation in dynamical systems with wreath product symmetry Gamma = Z(2) integral G, where Z(2) acts by +/-1 on R and G is a transitive subgroup of the permutation group S-N (thus G has degree N). The group Gamma acts absolutely irreducibly on R-N. We consider primary (codimension one) bifurcations from an equilibrium to heteroclinic cycles as real eigenvalues pass through zero. We relate the possibility of such cycles to the existence of non-gradient equivariant vector fields of cubic order. Using Hilbert series and the software package MAGMA we show that apart from the cyclic groups G (previously studied by other authors) only five groups G of degree greater than or equal to7 are candidates for the existence of heteroclinic cycles. We establish the existence of certain types of heteroclinic cycle in these cases by making use of the concept of a subcycle. We also discusss edge cycles, and a generalization of heteroclinic cycles which we call a heteroclinic web. We apply our method to three examples.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 33