Oscillation Theorems for Perturbed Second Order Nonlinear Differential Equations with Damping
Elabbasy, E. (1997)
Serdica Mathematical Journal
Similarity:
Some oscillation criteria for solutions of a general perturbed second order ordinary differential equation with damping (r(t)x′ (t))′ + h(t)f (x)x′ (t) + ψ(t, x) = H(t, x(t), x′ (t)) with alternating coefficients are given. The results obtained improve and extend some existing results in the literature.