摘要
本文给出一类非线性方程没有及至多有两个包围三个奇点的极限环的若干条件。
In this paper sufficient conditions for a nonlinear equation to have at most two limit cycles surrounding three singular points are given. As an application, bifurcations of limit cycles of several polynomial systems are studied.
出处
《应用数学学报》
CSCD
北大核心
1998年第2期206-214,共9页
Acta Mathematicae Applicatae Sinica
基金
国家自然科学基金
山东省基金
