I have problems to understand how the ODE15s (using NDFs) is adjusting the step size. I went through the documentation by LAWRENCE F. SHAMPINE "THE MATLAB ODE SUITE". However, I cannot find (or dont understand), if there is a rejection of old or new time step, or if there is a tolerance for a new time step ?
If there is any literature about varying time step in BDFs (or NDFs), I would be happy to receive suggestions. Else, if someone could explain me how ODE15s is changing the step size, I would be more than grateful for that.
Best wishes, Daniel Baeriswyl