etdrk4_test, a Fortran90 code which calls etdrk4(), which uses the ETD RK4 method to solve systems of stiff ODE's.
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etdrk4, a Fortran90 code which calls etdrk4(), which uses the ETD RK4 method to solve systems of stiff ODE's, by Aly-Khan Kassam, Lloyd Trefethen.