Ay. Aleksandrov, THE ASYMPTOTIC STABILITY OF THE EQUILIBRIUM OF NONAUTONOMOUS SYSTEMS, Journal of applied mathematics and mechanics, 62(1), 1998, pp. 31-36
A method of investigating the stability of non-linear systems acted up
on by unsteady perturbations is proposed, based on the use of Lyapunov
's second method. The sufficient conditions for asymptotic stability o
f the solutions of non-autonomous systems in critical cases are obtain
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