Martin R wrote:
> Do you have an example of a limit where maxima and sympy fail?
I do not have such example handy. However, I quickly tried
few examples and the third is:
(5) -> limit(x^2*exp(-x)*Ei(x) - x, x=%plusInfinity)
(5) 1
Type: Union(OrderedCompletion(Expression(Integer)),...)
AFIACS this is correct. OTOH:
Maxima 5.38.1 http://maxima.sourceforge.net
using Lisp SBCL 1.2.4.debian
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) limit(x^2*exp(-x)*expintegral_ei(x) - x, x, inf);
(%o1) minf
which is wrong.
BTW: This is easy for Gruntz method so Sympy probably gets it right.
--
Waldek Hebisch
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