On Tuesday, March 10, 2015 at 3:18:45 PM UTC-5, Nils Bruin wrote: > > On Tuesday, March 10, 2015 at 9:04:14 AM UTC-7, Dima Pasechnik wrote: >> >> On 2015-03-10, M M <mirette...@gmail.com> wrote: >> >> Integration is done by Maxima, and it is a bloody mess; e.g. >> > > It is, but I suspect that's not the cause here. I think it's just > numerical instability. > > sage: sage: integral(x/(x^3-x+1), x, 1, 2).n(100) > 0.56579991645642210974671290281 > sage: sage: integral(x/(x^3-x+1), x, 1, 2).simplify_full().n(100) > 0.56579991645643344322713389324 >
For what it's worth... ┌────────────────────────────────────────────────────────────────────┐ │ Sage Version 6.5, Release Date: 2015-02-17 │ │ Enhanced for SageMathCloud. │ └────────────────────────────────────────────────────────────────────┘ sage: integral(x/(x^3-x+1), x, 1, 2, algorithm='sympy').n() 0.565799916456428 sage: integral(x/(x^3-x+1), x, 1, 2, algorithm='sympy').simplify_full().n() 0.565799916456428 sage: integral(x/(x^3-x+1), x, 1, 2, algorithm='sympy').n(100) 0.56579991645642798527545946385 sage: integral(x/(x^3-x+1), x, 1, 2, algorithm='sympy').simplify_full().n(100) 0.56579991645642798527545946385 --Steve -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
