I add changes to the trac. So it will be possible to autodetect dependent and independent variables in most cases (actually in all cases sage is able to solve in this moment).
The same can be done with systems I guess and of course with bug http://trac.sagemath.org/sage_trac/ticket/7401 Anyone who are interested in can do it in similar way (look through http://groups.google.com/group/sage-devel/browse_thread/thread/f2ba2198dc5b79ed to get help) My opinion is - it is necessary to create native sage module to solve ODE. some new and easy to solve bugs: sage: x,t=var('x t') sage: f=function('f',x) sage: g=function('g',t,x) sage: de1=diff(f,x)+f+1 sage: de2=diff(g,x)+g+1 sage: dsolve(de1) (c - e^x)*e^(-x) sage: dsolve(de2) --------------------------------------------------------------------------- NotImplementedError Traceback (most recent call last) /media/cellar/sage/sage-4.3.3-linux-64bit-ubuntu_9.10-x86_64-Linux/ <ipython console> in <module>() /media/cellar/sage/sage-4.3.3-linux-64bit-ubuntu_9.10-x86_64-Linux/ local/lib/python2.6/site-packages/sage/calculus/desolvers.pyc in desolve(de, dvar, ics, ivar, show_method, contrib_ode) 375 raise NotImplementedError, "Maxima was unable to solve this ODE." 376 else: --> 377 raise NotImplementedError, "Maxima was unable to solve this ODE. Consider to set option contrib_ode to True." 378 379 if show_method: NotImplementedError: Maxima was unable to solve this ODE. Consider to set option contrib_ode to True. In second case answer is the same, but c = function('c',t) P.S.: Please look at http://groups.google.com/group/sage-devel/browse_thread/thread/f2ba2198dc5b79ed -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org To unsubscribe from this group, send email to sage-devel+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
