On Wed, Jul 22, 2009 at 9:31 AM, Golam Mortuza Hossain<gmhoss...@gmail.com> wrote: > > Hi, > > On Wed, Jul 22, 2009 at 7:47 AM, Burcin Erocal<bur...@erocal.org> wrote: > >>> > Inability to substitute the argument of D[] has ensured that >>> > I am forced out from using new sage symbolics for my own work. >> >> As I said above, you could have added a short term workaround for this, >> once you start using cython to call pynac internals. > > As someone said, talk is cheap. FYI, I spent two full days trying to > find a work-around that really works. May be I did stupid way but I would > like to invite you to substitute f(x^2)=1 in the following simple expression > by using any sage algorithm > > --------- > h = f(x^2).diff(x)*(x+1/x) > > sage: h.subs(f(x^2)==1) > 2*(x + 1/x)*x*D[0](f)(x^2) > > sage: h.subs(f(x^2).diff(x)==0) > 2*(x + 1/x)*x*D[0](f)(x^2) > --------- > >> I believe the effort could be better spent fixing the bugs you listed >> above. > > Thanks for letting know your "belief". If Sage development is dictated > by someone's belief rather than user's need, then I really shouldn't > argue anymore.
No worries. This will get sorted out. Burcin is sharing his opinion, but it isn't the law or anything, and Sage development is not done by "dictators". I would like to hear more from other users if anybody else has an opinion. -- William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
