quadex_ode, a Python code which solves a stiff ordinary differential equation (ODE), whose exact solution is a parabola, but for which errors grow exponentially.


The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.


quadex_ode is available in a MATLAB version and an Octave version and a Python version.

Related Data and codes:

python_ode, Python codes which sets up various systems of ordinary differential equations (ODE).


  1. Charles Curtiss, Joseph Hirschfelder,
    Integration of Stiff Equations,
    Proceedings of the National Academy of Science, USA,
    Volume 38, Number 3, pages 235-243, March 1952.

Source Code:

Last revised on 31 October 2020.