摘要
本文证明了以y=xm为不变集的平面n次多项式系统(m>n)不会有极限环,但可以存在奇闭轨.
N-order polynomial system in plane with y=xm as its invariant set was studied, and that no limit cycle there was proved and the existence of singular closed orbit was also obtained.
出处
《应用数学》
CSCD
1998年第2期77-80,共4页
Mathematica Applicata
关键词
平面多项式系统
不变集
奇闭轨
定性理论
Polynomial system in plane
Invariant set
Singular closed orbit