#11594: Symbolic integration of abs() failure
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Reporter: mjo | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone:
Component: calculus | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Originally posted to the mailing list by Pedro Cruz (I hope no one minds
me collecting these?):
http://groups.google.com/group/sage-
support/browse_thread/thread/4a24ce95e940820e
Actual result:
{{{
sage: integrate(abs(x^2 - 1), x, -2, 2)
integrate(abs(x^2 - 1), x, -2, 2)
}}}
Expected result:
{{{
sage: integrate(x^2 - 1, x, -2, -1) + integrate(1 - x^2, x, -1, 1) +
integrate(x^2 - 1, x, 1, 2)
4
}}}
If it's helpful, we can change the limits of integration to avoid the
roots. This seems to appease the integrate function:
{{{
sage: integrate(x^2, x, -1, 1)
2/3
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11594>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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