On the asymptotic stability of two-dimensional linear systems
Oscillation and nonoscillation criteria for the higher order self-adjoint differential equation are established. In these criteria, equation is viewed as a perturbation of the conditionally oscillatory equation where is the critical constant in conditional oscillation. Some open problems in the theory of conditionally oscillatory, even order, self-adjoint equations are also discussed.
Asymptotic behaviour of oscillatory solutions of the fourth-order nonlinear differential equation with quasiderivates is studied.
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