On 2012-05-15, kcrisman <kcris...@gmail.com> wrote: > (%i3) domain:complex; > > (%o3) complex > (%i4) integrate(x*cos(x^3),x,0,1/2); > > (%o4) > gamma_incomplete(2/3,%i/8)/6+gamma_incomplete(2/3,-%i/8)/6-gamma(2/3)/3
Hmm. I get a different result. I am using the current Git version. domain : complex; integrate (x*cos(x^3), x, 0, 1/2); => %i*gamma_incomplete(2/3,%i/8)/(4*sqrt(3)) -gamma_incomplete(2/3,%i/8)/12-%i*gamma_incomplete(2/3,-%i/8)/(4*sqrt(3)) -gamma_incomplete(2/3,-%i/8)/12+gamma(2/3)/6 expand (float (%)); => .1247560409610377 That's gratifying, but the problem, as I'm sure you know, is that the user won't know they have to change a global variable. > I don't see any of those up here, though, and the gamma_incomplete > evaluation is correct (gives the same via W|A, Sage = Pari in my version, > mpmath, and Maxima). I think that Maxima is somehow using the "real" > antiderivative, if that makes sense - is that possible, Robert? It seems plausible, but I don't know the integration code very well. best Robert Dodier -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
