Abstract
We consider a ℝ2-ordinary differential equation, where the fixed point (0, 0) presents a degenerate Poincare-bifurcation of resonancek(=2k′) and dominanced(=k−1). We prove the existence of a 2-dimensional linear manifoldV in the parameter space. Λ, on which the perturbed dominant differential system (SD) possesses heteroclinic orbits between fixed points. The numerical continuation of the local stable or unstable manifolds of the saddle fixed points shows that for any neighborhood, in Λ, of a point ofV corresponding to a saddle heteroclinic orbit, there exists only one stable (resp. unstable) periodic orbit close to the stable — in the Andronov sense [1]-(resp. unstable) heteroclinic orbit. Applications are given fork=4 andk=6.
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