摘要
研究了一类具有变系数和变偏差的二阶非线性中立型微分方程,建立了方程所有解都振动的判别准则,并给出了方程的—切可微解的导数振动的充分判据,所得结果改进并推广了俞元洪,傅希林和张立琴等人的研究成果.
The paper studies a class of second order nonlinear neutral differential equations with vairable coefficients and variable beviations.Criteria for all solutions to be oscillatory are established and suf- ficient conditions are also given to ensure those derivatives of all differentiable solutions to oscillate.The re- sults have improved and popularized the achievements in their scientific research by Mr.Yu Yuanhong and etc.
出处
《四川师范学院学报（自然科学版）》
1993年第3期269-273,共5页
Journal of Sichuan Teachers College(Natural Science)
基金
河南省高等学校青年科学基金资助课题.
关键词
非线性
中立型
微分方程
振动
nonlinear
neutral differential equation
oscillation.
