Introduction - If you have any usage issues, please Google them yourself
This a standard numerical Fortran77 procedures in case, though not profound and specialized algorithms, but for some commonly used algorithms, such as matrix computation, interpolation, fitting, numerical differentiation and integration, roots of nonlinear equations, function extreme, ordinary differential equations and partial differential equation gives the case such type of solution, numerical methods to help beginners or old user routine call, you can call the example program as a subrountine.