【摘要】 利用广义Riccati变换和平均不等式技巧,研究了一类三阶非线性泛函微分方程的振动性和渐近性,建立了所述方程一切解振动或者收敛于零的两个新的充分条件,推广和改进了一些文献中的结果.更多还原

【Abstract】 By using the generalized Riccati transformation and the averaging inequality technique,a class of third order nonlinear functional differential equations is studied,and two new sufficient conditions which insure that the solution is oscillatory or converges to zero are established.The results improve and generalize earlier ones.更多还原