By employing Lyapunov function method, several conditions for exponential stability with repect to part of the variables of systems are estabilished. Finally the application of this method are illustrated.%利用Lyapunov函数方法研究了脉冲切换系统的指数稳定性,得到了系统零解关于部分变元的指数稳定的若干结果,并给出相关例子.
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