二次系统中细鞍点的一般变换

The General Transforms on the Weak Saddle of Quadratic Differential System

本文研究二次系统中将细鞍点化为细焦点的一般变换，具有文［１］相同的结论，并包含文［１］的结论为其特例。

In this paper we research the general transforms that it Change a weak focus into a weak saddle in the quadratic differential system. We obtain the same result in ,the result in is this paper special case。