I am trying to pinpoint the following bug: sage: integral(sqrt(1+cos(x)^2),x) -1/24*sin(3*x) + 1/8*sin(x)
which is incorrect. One would think that maxima is returning a wrong answer, but if we ask directly to maxima, it leaves the integral as it is: sage: f = sqrt(1+cos(x)^2) sage: maxima.integrate(f._maxima_(),x) 'integrate(sqrt(cos(_SAGE_VAR_x)^2+1),_SAGE_VAR_x) which is the same result we get with sympy and fricas, and even by maxima itself: Maxima 5.41.0 http://maxima.sourceforge.net using Lisp ECL 16.1.2 Distributed under the GNU Public License. See the file COPYING. Dedicated to the memory of William Schelter. The function bug_report() provides bug reporting information. (%i1) integrate(sqrt(1+cos(x)^2),x); / [ 2 (%o1) I sqrt(cos (x) + 1) dx ] / So something strange is going on when we call maxima internally to compute that integral. I have tried to trace it, but I got lost in the intrincancies of the maxima interface. Does somebody know what exactly is causing this discrepancy? -- 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.
