可化为一个“积分小”系数的二阶非线性微分方程解的渐近性和振动性

THE ASYMPTOTIC BEHAVICR AND OSCILATION OF SECOND-ORDER NONLINEAR FUNCTIONAL DIFFERENTIAL EQUATIONSTO BE CHANGED INTO AN“INTEGRALLY SMALL”COEFFICIENT

本文讨论可化为一个“积分小”系数的二阶非线性微分方程的渐近性和振动性，得到若干充分性定理，推广和改进了文［１一４］的有关结果。

This paper discusses the asymptotic behavior and oscillation of a second order nonlinear functional differntial equation to be changed into an“integrally small”coefficient,and obtains sufficient critetia,which extend and improve the results of paper[1-4].