该文件中包含有常微分方程初值问题的四种数值解法，分别是：RK4法，AB4法，AB4_AM4预测矫*和改进的AB4_AM4法

rk4计算方法，ab 4-am4计算方法，这些为数值计算方法中的常用的几种计算多为方程组的方法-rk4 method, ab4 method, ab4-am4 calculation method such as numerical calculations in several commonly used methods are mostly equations

常微分方程初值问题的数值解的四种方法：RK4，AB4，AB4-AM4，改进的AB4-AM4-numerical solutions to initial value problems in ordinary differential equations.RK4，AB4，AB4-AM4，improvedAB4-AM4