摘要
本文将[1]中的方法稍微作了一些改进,对非线性系统(1)给出一个极限环的唯一性定理,然后应用它去证明了一个三次系统和一个二次系统之极限环的唯一性和单重性。
In this paper, we impove slightly the procedure in [1] and give the uniqueness Theorem to system and then apply this resut to prove that the system has at most one simplc unstable limit cycle and that the system has at most one simple stable limit cycle.
出处
《南京大学学报(自然科学版)》
CAS
CSCD
1990年第3期363-372,共10页
Journal of Nanjing University(Natural Science)