Mathematics – Dynamical Systems
Scientific paper
2005-07-04
Mathematics
Dynamical Systems
Scientific paper
In this paper, we study the realizability problem for retarded functional differential equations near an equilibrium point undergoing a nonlinear mode interaction between a saddle-node bifurcation and a non-resonant multiple Hopf bifurcation. In contrast to the case of transcritical/multiple Hopf interaction which was studied in an earlier paper, the analysis here is complicated by the presence of a nilpotency which introduces a non-compact component in the symmetry group of the normal form. We present a framework to analyse the realizability problem in this non-semisimple case which exploits to a large extent our previous results for the realizability problem in the semisimple case. Apart from providing a solution to the problem of interest in this paper, it is believed that the approach used here could potentially be adapted to the study of the realizability problem for toroidal normal forms in the general case of repeated eigenvalues with Jordan blocks.
Choi Younsun
LeBlanc Victor G.
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