极限环不存在性的一种特殊证法

A Special Proof Method for the Non existence of Limit Cycles

极限环不存在性的证明，一般是采用一些经典的思想方法（见文［１］、［２］）；在研究了一个简单Ｅ１３ 系统的极限环问题时，采用了一种比较特殊的思想方法，这种方法的运用依赖于一个构造出来的辅助系统，故称之为辅助系统法。

Usually make use of some classical proof methods for the non existence of limit cycles.Prove the non existence of limit cycles of a simple class of E 1 3 system by using a special method.This method is based upon a auxiliary system which is structured,so call it the auxi system method.