Hi.
I have somewhat of a dumb question never having actually solved an ODE numerically. I understand that the RK method assumes I have an initial condition. Is there also a backward RK that solves it with final condition, or is it exactly the same no matter where I start it.
Thanks
shore

Yes, this "backwards Runge-Kutta" that you have in mind is conceptually the same as forward Runge-Kutta. It will happen if the initial value of the independent variable is larger than the final value (or to put it another way, you have a negative step size).

Hope this helps...

Jan M. (^_^)