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Beschreibung:
We consider planar vector fields $f(x,y,\lambda)$ depending on a three-dimensional parameter vector $\lambda$. We assume $f(0,0,\lambda) = 0$ and that there exists a parameter value $\lambda = \lambda_0$ connected with the Andronov–Hopf bifurcation of a limit cycle of multiplicity three from the origin. We describe an algorithm to continue the corresponding local Andronov–Hopf bifurcation curve in the parameter space which is based on the continuation of a periodic orbit to some augmented vector field and the construction of a Poincaré function to another augmented system.