摘要
讨论了一类高维非自治系统周期解的存在性问题，得到了判别周期解存在的充分条件．
In this paper, the existence of periodic solutions for a kind of higher dimensional nonautonomic system is discussed. And the sufficient conditions of discriminating existence of periodic solutions are obtained.
出处
《天津城市建设学院学报》
CAS
1997年第2期64-67,共4页
Journal of Tianjin Institute of Urban Construction
