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

- quadex_ode_test.m, calls all the tests.
- quadex_ode_test.sh, runs all the tests.
- quadex_ode_test.txt, the output file.

**quadex_euler** used euler() to solve the problem.

- euler.m, an Euler ODE solver.
- quadex_euler.m, the source code.
- quadex_euler_2500.png, a plot of the solution.

**quadex_backward_euler** used backward_euler() to solve the problem.

- backward_euler.m, a Backward Euler ODE solver.
- quadex_backward_euler.m, the source code.
- quadex_backward_euler_2500.png, a plot of the solution.