This seems to come from this (7.2.beta6): sage: (-0.9).log_gamma() NaN sage: (-1.9).log_gamma() 1.71621928121964 sage: (-2.9).log_gamma() NaN sage: (-3.9).log_gamma() -0.709468008908392 sage: (-4.9).log_gamma() NaN sage: (-5.9).log_gamma() -4.07365556493664 sage: (-6.9).log_gamma() NaN sage: (-7.9).log_gamma() -8.07203973601283
As far as I understand, pynac uses this for evaluating numerical arguments. Am Dienstag, 14. Juni 2016 09:52:55 UTC+2 schrieb Kwankyu Lee: > > > sage: x=-.9 >> >> sage: y=.1 >> >> sage: gamma(x)*gamma(y)/gamma(x+y) >> >> 17.5241239902668 >> >> sage: beta(x,y) >> >> NaN >> > > I get the same on Sage 7.3 beta3 on Mac. > -- 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 https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
