rkf45, a Fortran77 code which implements the Watt and Shampine RKF45 ODE solver.
The code is a Runge-Kutta-Fehlberg algorithm for solving an ordinary differential equation, with automatic error estimation using rules of order 4 and 5.
The computer code and data files made available on this web page are distributed under the MIT license
rkf45 is available in a C version and a C++ version and a Fortran77 version and a Fortran90 version and a MATLAB version and a Python version.
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