The Exponential Stability With Respect to Part of the Variables in the Impulsive Differential System at Fixed Times

We investigate the exponential stability with respect to part of the variables in the impulsive differential system at fixed times,one sufficient condition is found for exponential stability with respect to part of the variables,and a new stability criterion with respect to part of the variables is also obtained in this paper.Finally the application of this method are illustrated with some examples.