karim O. Amin, Irina Badralexi, A. Halanay, R. Mghames
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A stability theorem for equilibria of delay differential equations in a critical case with application to a model of cell evolution
In this paper the stability of the zero equilibrium of a system with time delay is studied. The critical case of a multiple zero root of the characteristic equation of the linearized system is treated by applying a Malkin type theorem and using a complete Lyapunov-Krasovskii functional. An application to a model for malaria under treatment considering the action of the immune system is presented.