摘要
讨论了二次多项式系统的极限环的相对位置问题 ,证明当l≥ 0 ,mδ >0时 ,系统 (E2 )的极限环是集中分布的 ;当l<0时 ,给出了系统 (E2 )
The relative position of limit cycles of the quadratic system(E 2) is discussed. It is proved that the limit cycles of the system(E 2) can only be distributed around one of the two rough focuses,provided that the system has two rough focuses N(0,1),O(0,0) and l≥0,mδ>0.
关键词
极限环
集中分布
二次系统
limit cycles
concentrated distribution
quadratic system
