该方法是在Fortran 编译环境下通过幂法反幂法的计算矩阵特征值的源代码-The method is a Fortran compiler environment through the source code of the inverse power law power method to calculate the matrix eigenvalue

幂法和反幂法求特征值，编译即可运行，需要文件输入-power method&& inverse power method，the program can run successfully, you need a file for input