Using simplifying assumptions that are related to the time reversal symmetry, a 1-dimensional family of 8-stage pseudo-symplectic Runge-Kutta methods of order (4, 8) is derived. An example of 7-stage method of order (4, 9) is given.

翻译：采用与时间逆转对称有关的简化假设,得出了8级假假眼龙格-库塔顺序方法(4、8)的一维系列,以7级顺序方法(4、9)为例。