I am indifferent for expand_multinomial, but I think that expand_mul should only expand on the very top level for deep=False. I use this in several algorithms.
Does Mathematica have a deep option on its expand like we do? Aaron Meurer On Aug 9, 2009, at 5:28 PM, Luke wrote: > > > > On Aug 9, 12:48 pm, "Aaron S. Meurer" <asmeu...@gmail.com> wrote: >> I wonder if 1/(x + y)**2 should be expanded without the deep option. >> The same for 1/(x*(x + y)) and expand_mul(1/(x*(x + y))**2). > > I think it should, this is what Mathematica does. It seems to me that > you wouldn't call expand unless this was what you wanted. In effect, > this would cause things on the denomiator (e.g. Pow's with a negative > integer exponent) to be treated just as equally as things with a > positive integer exponent (things on the numerator). It seems to me > this is the right thing to do, but perhaps you could provide examples > of when this wouldn't be desired? > > ~Luke >> >> Aaron >> On Aug 9, 2009, at 1:16 PM, Ondrej Certik wrote: >> >> >> >>> On Sun, Aug 9, 2009 at 11:42 AM, Aaron S. Meurer<asmeu...@gmail.com> >>> wrote: >> >>>> Thanks. I noticed that expand wasn't expanding denominators >>>> correctly, but I haven't had the time to look into it. >> >>>> It looks like expand_mul needs to be fixed too: >>>> >>> print expand(1/(x*(x + y)), deep=True) >>>> 1/(x*(x + y)) >> >>> Yeah, we just discovered that too. >> >>> Ondrej >> >> > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-patches" group. To post to this group, send email to sympy-patches@googlegroups.com To unsubscribe from this group, send email to sympy-patches+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-patches?hl=en -~----------~----~----~----~------~----~------~--~---
