On Sat, Aug 8, 2009 at 3:50 AM, Golam Mortuza Hossain<gmhoss...@gmail.com> wrote: > > Hi, > > If I compute partial derivative of f(x, x) w.r.t. x in Sage > then I get > ----- > sage: f(x, x).diff(x) > D[0](f)(x, x) + D[1](f)(x, x) > ----- > > Now if I say "f(x, x) = x" then from the output above I would > get "2". On the other hand, had I computed it directly, I > would get "1" > ------ > sage: (x).diff(x) > 1 > ------ > > I encountered this issue while testing out new "diff" derivative > implementation. So it would be good to know the right approach > for handling this issue.
What do *you* think the right approach is? You probably have more experience with the question at hand than anybody else around here. -- William > > Cheers, > Golam > > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
