摘要
讨论二次微分系统Ⅰ类方程的极限环的存在和不存在性问题 ,纠正了文
In this paper ,the problem on the existence and non-existence of limit cycles of Type Ⅰequation of quadratic differential systems is discussed and an error on the existence of limit cycles on large range when I=0 in is corrected.
出处
《安徽大学学报(自然科学版)》
CAS
2001年第4期7-11,共5页
Journal of Anhui University(Natural Science Edition)
基金
安徽省教委自然科学基金资助课题 (2 0 0 0J10 0 8)