Can someone recommend a reference containing an explanation of how to implement an implicit Runge-Kutta technique? In case the equation type matters, it is for a diffusion problem.

Thanks, Chris Reaume

I used a semi-implicit version for chemical kinetics. it works fine (maybe a little bit outdated) M.L.Michelsen, AIChe Journal 976 22(3) 594-597 "An Efficient General Purpose Method for the Integration of Stiff Ordinary Differential Equations". Or take a look at the programming libraries of ISML or NAG. wolfgang