I'm guessing chop chops some intermediate expression that is smaller than the cutoff in this case. It probably should be considered a bug.
Aaron Meurer On Thu, May 21, 2015 at 8:53 AM, Paul Royik <distantjob...@gmail.com> wrote: > Nobody could tell how chop works? > > On Tuesday, May 5, 2015 at 11:41:24 AM UTC+3, Paul Royik wrote: >> >> expr = >> 2682469501914725726236807146020965585039500052171867725591732162347*exp(-60)/48648670709168952944186714683693506574127 >> >> N(expr) outputs 0.482830727370627 >> but >> N(expr, chop=True) outputs 0 >> >> In some other expressions chop doesn't make 0. >> >> So, how chop works? > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/3ef42fe1-b3cb-45d3-80ef-6af88a181bb2%40googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2B8_y33baewepeahErxA6aceo01mmE_1mcFS2tFicM6tg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
