On Thu, Dec 8, 2011 at 8:33 AM, Eric Kangas <[email protected]> wrote: > the functions F(u), and G(v) are only symbolic they don't even have an > equation attached to them. Doesn't maxima need an actual equation to > solve?
I just noticed you have 2 independent variables as well! My guess is that maxima does not have algorithms for that. I many cases sympy is better at solving DEs (sympy is included in sage) but I don't think sympy can do it either. You might ask on the sympy list though to be sure. > > On Dec 7, 10:22 am, David Joyner <[email protected]> wrote: >> On Wed, Dec 7, 2011 at 1:01 PM, Kjetil brinchmann Halvorsen >> >> <[email protected]> wrote: >> > Hola! >> >> > I tried the following: >> > u = var('u'); v = var('v') >> > F = function('F',u) >> > G = function('G', v) >> > DEs = [diff(F,u)*(G(u)-G(0))==1,diff(G,v)*(F(1)-F(v))==1] >> > desolve_system(DEs,[F,G], ivar=[u,v]) >> >> > but result are: >> >> ... >> >> > ... >> > TypeError: ECL says: Error executing code in Maxima: desolve: can't >> > handle this case. >> >> My guess is that this means Maxima cannot solve this non-linear >> system of DEs. >> >> >> >> > Any ideas? >> >> > Kjetil >> >> > -- >> > "If you want a picture of the future - imagine a boot stamping on the >> > human face - forever." >> >> > George Orwell (1984) >> >> > -- >> > To post to this group, send email to [email protected] >> > To unsubscribe from this group, send email to >> > [email protected] >> > For more options, visit this group >> > athttp://groups.google.com/group/sage-support >> > URL:http://www.sagemath.org > > -- > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
