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Wrong error message

asked 2015-08-17 05:16:08 -0500

Peter Luschny gravatar image

updated 2015-08-18 03:40:24 -0500

tmonteil gravatar image

The best things in Sage are 'mathematica_free'. No, no, I never would say this!

(exp(2*x)/cosh(exp(x))).integral(x,algorithm='mathematica_free')

I*(log(I*e^(-e^x) + 1) - log(-I*e^(-e^x) + 1))*e^x + I*polylog(2, I*e^(-e^x)) - I*polylog(2, -I*e^(-e^x))

BUT:

(exp(3*x)/cosh(exp(x))).integral(x,algorithm='mathematica_free')

AttributeError: 'NoneType' object has no attribute 'groups'

I think Sage wanted to say: "Mathematica could not find a formula for your integral."

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answered 2015-08-17 08:52:16 -0500

kcrisman gravatar image

We didn't have a way to parse the current things that is returned from this integrator when there is no solution found. See Trac 19046.

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Asked: 2015-08-17 05:16:08 -0500

Seen: 112 times

Last updated: Aug 17 '15