The Runge–Kutta–Fehlberg method (RKF45) is one of the widely used ODE solvers. GRKF45 is a parallel RKF45 solver with many different parameter sets.
The original RKF45 code was taken from cpp code by John Burkardt (LGPL).
Currently, you need to define the ODEs in r4_f0, r4_f1, r4_f2, .... in GRKF45.
- grkf45_1d (1D ODE)
- grkf45_2d (2D ODE, the van der pol oscillator)
- grkf45_3d (3D ODE, the Lorenz attractor)