[Maxima-bugs] [ maxima-Bugs-3313531 ] integral from minf to inf of an absolute value combo fails

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Bugs item #3313531, was opened at 2011-06-07 23:22
Message generated for change (Comment added) made by dgildea
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Category: Lisp Core - Integration
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: https://www.google.com/accounts ()
Assigned to: Nobody/Anonymous (nobody)
Summary: integral from minf to inf of an absolute value combo fails

Initial Comment:
Maxima 5.24.0 http://maxima.sourceforge.net
using Lisp SBCL 1.0.24
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) integrate(abs(x - 1) + abs(x + 1) - 2*abs(x),x,minf,10);
(%o1)                                  2
(%i2) integrate(abs(x - 1) + abs(x + 1) - 2*abs(x),x,minf,inf);
(%o2)                                  0

The answer should be 2 for ANY interval containing [-1,1].  Interestingly, it seems to work for every combination of inf/minf and numbers, but not for minf to inf - that seems to be the only failing example.

See original report at http://trac.sagemath.org/sage_trac/ticket/11445.

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>Comment By: Dan Gildea (dgildea)
Date: 2011-06-09 15:55

Message:
Fixed in defint.lisp master branch.


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