Updates: Labels: -NeedsReview NeedsBetterPatch Comment #3 on issue 1660 by ondrej.certik: [PATCH] derivatives of composed functions should not evaluate to a derivative in terms of a function http://code.google.com/p/sympy/issues/detail?id=1660
First of all, thanks for the contribution and sorry for my late reply. I agree that it should be improved. I disagree with removing the following tests: - assert f(x).diff(x) == Derivative(f(x), x) - assert (f(x)**3).diff(x) == 3*f(x)**2*f(x).diff(x) I think those are valid tests, aren't they? The discussable part is what to do with f(2*x).diff(x), etc. I think we need to improve the Derivative class to be able to represent derivatives with respect to any point. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---