sage: f = y(n+2) - y(n+1) - y(n) sage: rsolve(f, y(n), { y(0):1, y(1):1 }) (1/2 + 5**(1/2)/2)**n/2 + (1/2 - 5**(1/2)/2)**n/2 - 5**(1/2)*(1/2 - 5**(1/2)/2)**n/10 + 5**(1/2)*(1/2 + 5**(1/2)/2)**n/10
That's perfect !! Thank you very much !! :-) Their interface is a bit clumsy though, I admit... It could be good to be able to do it directly in Sage :-) Nathann -- 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 URL: http://www.sagemath.org