摘要
研究四阶泛函微分方程x(4)(t)+a1x(t)+a2x″(t)+a3x′(t)+a4x(t)+g(t,x(t-τ))=p(t)的周期解问题.首先将该方程转变为四维的拟线性微分方程(组),得到该方程存在唯一周期解的充分条件;然后通过选取适当的李雅普诺夫函数,推导方程任一解的全局吸引性,并进一步得到方程周期解的全局吸引性.最后,通过实例证实了本文结果的正确性.
We consider the periodic solution for the following fourth order functional differential equation x(4)(t)+a1x″′(t)+a2x″(t)+a3x′(t)+a4x(t)+g(t,x(t-τ))=p(t). Firstly we obtain the sufficient condi- tions for the existence of uniqu periodic solution of this equation by converting the equation into a four-dimensi- nal quasi-linear differential equation. Then, by selecting an appropriate Lyapunov function, the global attrac- tivity of an arbitraty solution for this equation is derived, and furthermore, the global attractivity of a periodic solution for this equation is given. Finally, an example is provided to verify the correctness of the results in this paper.
出处
《延边大学学报(自然科学版)》
CAS
2013年第4期240-243,276,共5页
Journal of Yanbian University(Natural Science Edition)
关键词
泛函微分方程
周期解
唯一性
全局吸引性
functional differential equation
periodic solution
uniqueness
global attractivity