Oscillation of the solutions of a class of impulsive differential equations with a deviating argument.
We study asymptotic and oscillatory properties of solutions to the third order differential equation with a damping term We give conditions under which every solution of the equation above is either oscillatory or tends to zero. In case and if the corresponding second order differential equation is oscillatory, we also study Kneser solutions vanishing at infinity and the existence of oscillatory solutions.
In this article, we obtain sufficient conditions so that every solution of neutral delay differential equation oscillates or tends to zero as , where, is any positive integer, , and are bounded for each . Further, , , , , , and . The functional delays , and and all of them approach as . The results hold when and . This article extends, generalizes and improves some recent results, and further answers some unanswered questions from the literature.
A sufficient condition for the nonoscillation of nonlinear systems of differential equations whose left-hand sides are given by -th order differential operators which are composed of special nonlinear differential operators of the first order is established. Sufficient conditions for the oscillation of systems of two nonlinear second order differential equations are also presented.