tough_ode, a Python code which sets up and solves a system of four ordinary differential equations (ODE) which is extremely difficult to solve accurately.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
tough_ode is available in a MATLAB version and an Octave version and a Python version.
python_ode, Python codes which sets up various systems of ordinary differential equations (ODE).