摘要
给出了具有三个一阶细焦点的平面多项式系统经参数扰动后在三个焦点外围分别同时分支出极限环的例子.
The limit cycles in a cubic differential systems with three weak focus of order one was given, it is proved that in this situation the periphery of the three focus bifurcate out at least one limit cycles at the same time respectively.
出处
《北华大学学报（自然科学版）》
CAS
2003年第4期282-284,共3页
Journal of Beihua University（Natural Science）
关键词
三次系统
细焦点
极限环
Cubic systems
Weak focus
Limit cycles
