On Saturday, October 21, 2017 at 10:52:48 PM UTC+1, Emmanuel Charpentier wrote: > > That doesn't tell us why Maxima thiks that this is a Cauch principal > value. In fact : > sage: integrate(1/cos(theta)^2,theta) > tan(theta) > which I remind having learned when I was about 15... > > Maxima bug ? >
Maxima's definite integration package appears to be a big mess, and it's not being given a lot of attention. There are dozens of bugs of this sort on their bug tracker. > -- > Emmanuel Charpentier > > Le vendredi 20 octobre 2017 08:39:03 UTC+2, Ralf Stephan a écrit : >> >> The immediate reason is that maxima returns: >> Principal Value >> (%o4) 2 >> >> and Sage since #7377 (7 years ago) catches "Principal Value" and makes it >> divergent. >> See https://trac.sagemath.org/ticket/7377 for reasons this was >> introduced. >> There are tickets that urge to fix this: >> >> https://trac.sagemath.org/ticket/13511 >> https://trac.sagemath.org/ticket/17608 >> >> So it's a Sage bug in the Maxima interface. >> >> Regards, >> > -- 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.
