On Fri, 10 Jul 2009 10:24:18 -0300 Golam Mortuza Hossain <gmhoss...@gmail.com> wrote:
> > Hi, > > On Fri, Jul 10, 2009 at 9:58 AM, Burcin Erocal<bur...@erocal.org> > wrote: > > > > I'll try to spare some time for pynac this weekend, and look at the > > changes you need for the derivatives to work. > > Thanks! > > > I'm not convinced that > > adding a new field to the function_options class to switch the > > application of the chain rule on/off is really necessary at this > > point. I might just add a quick hack to special case the integral > > function you define, unless someone comes up with other examples > > where disabling the chain rule is needed. > > There are at least three other functions for which new derivative > returns mathematically wrong results because it uses > chain rule blindly > > (1) limit( f(x), x=a) > > (2) laplace( f(t), t, s) > > (3) inverse_laplace ( F(s), s, t) That was quick! OK, I'll do things properly and add the flag as you suggested. New deadline for this is Tuesday though. :) Thanks. Burcin --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
