一类三次系统极限环的存在性不存在性及唯一性

The Existence Nonexitence and Uniqueness of Limit Cycle for a Class of Cubic Systems

本文对一类三次系统进行了讨论，得到了极限环的存在性，不存在性及唯一性的几个充分条件。

In this paper,we discuss a class of cubic systems. We obtained some sufficient conditions for the existence nonexistence and uniqueness of limit cycle.