On Sat, May 30, 2009 at 10:50 PM, Alasdair <amc...@gmail.com> wrote:
>
> 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)')
>Also, see http://maxima.sourceforge.net/docs/tutorial/en/gaertner-tutorial-revision/Pages/DiffEq0001.htm This might be related to http://trac.sagemath.org/sage_trac/ticket/1291 (which I found using google) but trac is down now so I can't be sure. > 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 > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
