基于祖冲之类方法具有保辛性

摘要

The Zu-type method for the differential-algebraic equation can satisfy the constraint equations at each time node and can be implemented easily because its easy computational format.Hence,the Zu-type method is quite practical.Herein,the Zu-type method was found to be not only constraint-preser-ving but also symplectic.%分析微分-代数方程的祖冲之类算法可以在时间格点上精确满足约束方程，计算格式简单，易于编程计算，因此十分实用。本文证明，基于祖冲之类方法不仅保约束，同时还保辛。