摘要
本文给出了文献［１］中定理４的一个初等分析的证明，并获得了极限环个数的简洁判据．
In this paper,we will give a elemetary analytic prove of the theorem 4 in paper ,and obtain the compact decider grounds of number of the limit cycle.
出处
《广西工学院学报》
CAS
1998年第1期11-13,共3页
Journal of Guangxi University of Technology
关键词
极限环
奇闭轨
三次系统
Limit cycle
Singular closed trajectory
discriminant.
