关于高阶Runge-Kutta方法的对称性及藕对性

On Symmetry and Symplect of Runge-Kutta Method of High Order

借助于Haier及Wanner的W变换，研究高阶Runge－Kutta方法的表征，简化了SunGeng定理的条件．

Based on the W-transformation of Hairer and Wanner, the charaderistics of symmetry and symplect of Runge-Kutta method are presented. They simplify the condition of theorem 0btained by Sun Geng in [5].