There is an integral which Sage correctly numerically integrates, and which Sage symbolically gets very wrong. William and I looked into this during Sage Days 68, and he discovered that, in fact, Maxima gets this integral very wrong as well. (More correctly, the particular configuration and version of Maxima built into Sage gets the integral very wrong. Some setting might be incorrect or badly chosen.)
The integral of sqrt( cot(x)^2 ) dx for pi/4 < x < 3pi/4 is not too bad to compute by hand. The answer is the logarithm, base e, of 2. The numerical integration in Sage agrees. Maxima thinks that the answer is instead zero. (Or more correctly, the particular configuration and version of Maxima built into Sage thinks the answer is zero.) Please see the attached sagews worksheet. Is there anyone on this list who knows Maxima in general, and the connections/interface between Maxima and Sage in particular? ---Greg -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
The Bug In Maxima.sagews
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