Mathematics – Dynamical Systems
Scientific paper
2010-01-29
"Journal of Middle Volga Mathematical Society", 11, 2(2009), 146-157
Mathematics
Dynamical Systems
Scientific paper
We consider a delay differential equation that occurs in the study of chronic myelogenous leukemia. After shortly reminding some previous results concerning the stability of equilibrium solutions, we concentrate on the study of stability of periodic solutions emerged by Hopf bifurcation from a certain equilibrium point. We give the algorithm for approximating a center manifold at a typical point (in the parameter space) of Hopf bifurcation (and an unstable manifold in the vicinity of such a point, where such a manifold exists). Then we find the normal form of the equation restricted to the center manifold, by computing the first Lyapunov coefficient. The normal form allows us to establish the stability properties of the periodic solutions occurred by Hopf bifurcation.
Georgescu Raluca-Mihaela
Ion Anca-Veronica
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