一类二阶非线性泛函微分方程的振动性

Oscillations for a Class of Second Order Nonlinear Differential Equations

本文讨论二阶非线性泛函微分方程（１）（２）获得了方程（１）和（２）振动的充分性判据，推广和改进了已知的一些结果．

In this paper, we disscuss a class of second order nonlinear differential equations (1) and (2) where, a (t),p (t),q(t), τ(t) ∈ C[(t0, ∽), (0, ∽)],f(u) ∈ C(R, R), sufficient conditions are obtained for all solutions of the equations to be oscillatory.