You use solve_rec like this:
maxima.load('solve_rec')
maxima('solve_rec(f[n+2]-3*f[n+1]+2*f[n]=2^n,f[n],f[0]=1,f[1]=0)')
I think that solve_rec can in fact solve a larger class of difference
equations than linear equations with constant coefficients, but my
use doesn't involve anything more that this.
-Alasdair
On May 31, 11:22 am, Jason Grout <jason-s...@creativetrax.com> wrote:
> Alasdair wrote:
> > I can solve a difference equation using the Maxima interface, and the
> > "solve_rec" package included with Maxima. Apparently SymPy can also
> > solve difference equations, but I can't find any documentation or
> > examples to show how this is done. So, two questions:
>
> > 1) How can difference equations be solved using SymPy, from within
> > Sage?
> > 2) Is it possible to write a little bit of code which will provide a
> > difference equation solver for Sage, using Maxima's solve_rec package
> > to perform the actual calculation?
>
> Can you give an example in maxima of using the solve_rec command?
>
> Jason
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