As Niles already said it would be better to have it as a symbolic function sage: f(x) = real_nth_root(x, 5) sage: f x |--> real_nth_root(x,5)
2014-06-22 22:36 UTC+02:00, Gregory Bard <gregory.bard1...@gmail.com>: > Yes, that is reasonable. Let us call it "real_nth_root" instead, as > suggested by Nicolas Thiery. Any other requests/comments? > > It would be superb if this could be resolved by June 30th, when my > book goes to the American Mathematical Society for publication... > ---Greg > > On Sun, Jun 22, 2014 at 9:02 AM, William Stein <wst...@gmail.com> wrote: >> On Sun, Jun 22, 2014 at 8:27 AM, Nicolas M. Thiery >> <nicolas.thi...@u-psud.fr> wrote: >>> On Fri, Jun 20, 2014 at 06:33:52PM -0700, Gregory Bard wrote: >>>> It seems that the consensus on both Sage-devel and Sage-edu is to go >>>> with some sort of nth_real_root function. I propose the following, >>>> which I have tested for evaluation, plotting, differentiation, and >>>> integration. Sadly, the derivative has a Dirac delta in it, which is >>>> ... perhaps unavoidable because of the vertical tangency of the >>>> cuberoot function at x=0. (Naturally, we can remove the asserts once >>>> testing is completed. >>>> ---Greg >>>> >>>> def nth_real_root( x, n ): >>> >>> Just 2 cents of outsider feedback since I have not followed the >>> discussion, and am not knowledgeable on the topic. This names suggests >>> to me that we look at all the real roots of n (for whatever this >>> means), and then take the n-th one. So maybe real_nth_root instead? >> >> +1 >> >>> >>> Cheers, >>> Nicolas >>> -- >>> Nicolas M. Thiéry "Isil" <nthi...@users.sf.net> >>> http://Nicolas.Thiery.name/ >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "sage-devel" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to sage-devel+unsubscr...@googlegroups.com. >>> To post to this group, send email to sage-devel@googlegroups.com. >>> Visit this group at http://groups.google.com/group/sage-devel. >>> For more options, visit https://groups.google.com/d/optout. >> >> >> >> -- >> William Stein >> Professor of Mathematics >> University of Washington >> http://wstein.org >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "sage-devel" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/sage-devel/Q8VLKBypcJk/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> sage-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to sage-devel@googlegroups.com. >> Visit this group at http://groups.google.com/group/sage-devel. >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
