As reported,
var('r')
assume(r>0)
integrate(r * sqrt( (2*r*cos(x)/sqrt(3))^2 + ( 2/3 + 4*r*sin(x)/3 )^2 ), x)gives -1/12*(2*r*x - r*sin(2*x))*r which is indeed incorrect. Is the root cause known? ---------- Forwarded message ---------- Dear Mr Andrey Novoseltsev, I am writing you to report a problem that I have encountered while computing a one variable integral with Sage. I attach a document with the result that Sage produces for the indefinite integral. This happens to be wrong, as can easily be proved by comparing the derivative of the result with the function to be integrated (the difference is not constant). Sorry, I cannot provide any hint on how to fix this. It is not an important issue for me anymore, since I have worked around my problem and have solved it an a different way. I am reporting it for your records, in case you find it interesting to know. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Indefinite_integral.pdf
Description: Adobe PDF document
