NON-EXISTENCE OF LIMIT CYCLE AROUND A WEAK FOCUS OF ORDER THREE FOR ANY QUADRATIC SYSTEM

被引：4

作者：

李承治 ^{[1
]}

机构：

[1] Department of MathematicsBeijing University.China

来源：

ChineseAnnalsofMathematics | 1986年 / 02期

关键词：

NON-EXISTENCE OF LIMIT CYCLE AROUND A WEAK FOCUS OF ORDER THREE FOR ANY QUADRATIC SYSTEM;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In 1980 Professor Ye Yangian proposed a conjecture that around a weak focus oforder 3 of any real quadratic differential system there can exist no limit cycle.It is thepurpose of this paper to give a proof of the conjecture by using the method of continuousvariation of a coefficient.

引用

页码：174 / 190

页数：17

共 37 条

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