Implicit Runge-Kutta method of fifth order with three stages (Radau IIA) for problems of the form My’=f(x,y) with possibly singular matrix M; with dense output (collocation solution).

Applicable for stiff problems of low to medium accuracy.

Applicable solver settings:

  • Absolute tolerance
  • Relative tolerance
  • Initial step size
  • Max step size
  • Min step size
  • Refine
  • Limit data points to last
  • Max Newton iterations
  • F Newt
  • Thet


  • E. Hairer and G. Wanner. Solving Ordinary Differential Equations II: Stiff and Differential-algebraic Problems. Springer-Verlag, second revised edition, 1996.