duffing_ode, a Python code which sets up and solves Duffing's second-order ordinary differential equation (ODE) whose solution can exhibit chaotic behavior.
The information on this web page is distributed under the MIT license.
duffing_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).