[reactive] Status of Reactive "feedback" (recursive integral, etc)

[Creighton Hogg]

2008/12/3 Peter Verswyvelen <bugfact at gmail.com>:
> Okay.
> It would be nice to experiment with higher order integration techniques too.
> Right now Reactive uses Euler integration but the user should be able to
> choose between Euler, Midpoint, Simpson (or whatever other quadrature rule).
> However, aren't we actually interested in approximating ordinary
> differential equations (or more exactly, initial value problems), instead of
> using integral directly? In which case we should choose between 1-th, 2nd,
> or 4th order Runge Kutta or something?
> I'm not an expert here, but it would be nice to think about this I guess.

I think a 4th order Runge Kutta is something we'd want to have, maybe
as part of a FRP.Reactive.Physics package?