摘要
研究了一类有一个零特征根的21阶奇点的五次系统,并给出了极限环存在与否的条件.
A class of fifth system with one twentyone singular point and one zero eigenvalue is studied,and some conditions of existence or nonexistence of the limit cycle are given
出处
《烟台师范学院学报（自然科学版）》
2003年第3期173-177,共5页
Yantai Teachers University journal(Natural Science Edition)
关键词
五次系统
极限环
有限远奇点
无穷远奇点
fifth system
limit cycle
finite singular point
infinity singular point
