stiff_ode

stiff_ode, a Fortran90 code which sets up an ordinary differential equation (ODE) y'=lambda*(cos(t)-y), which exhibits stiffness, making accurate solution difficult.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

stiff_ode is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version and an R version.

Related Data and codes:

stiff_ode_test

lorenz_ode, a Fortran90 code which approximates solutions to the Lorenz system, creating output files that can be displayed by gnuplot().

predator_prey_ode, a Fortran90 code which solves a pair of predator prey ordinary differential equations (ODE).

stiff_exact, a Fortran90 code which returns an exact solution y(t) to a stiff ordinary differential equation (ODE) of the form y' = lambda * ( cos(t-t0) - y).

Reference:

John D Cook,
Stiff differential equations,
https://www.johndcook.com/blog/
Posted 02 February 2020.

Source Code:

stiff_ode.f90, the source code.
stiff_ode.sh, compiles the source code.

Last revised on 27 April 2020.