This paper points out that the methods of locuspictureand alternate matrix Pare very difficult to learn; thereforethespecific method ofalternatematrix and howto get the coordinate system after alternate matrix isintroduced in this paper.

• 本文主要解决了变换矩阵的具体求法以及变换后坐标系的确定问题,以便能对给定的一次线性微分方程组尽快画出轨线图,比较直观的了解奇点附近轨线的拓扑结构。