#11590: Integrating the sgn() function can produce incorrect results
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Reporter: mjo | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone:
Component: calculus | Keywords:
Work_issues: | Upstream: Reported upstream. Developers
acknowledge bug.
Reviewer: | Author:
Merged: | Dependencies:
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Changes (by kcrisman):
* upstream: Reported upstream. Little or no feedback. => Reported
upstream. Developers acknowledge bug.
Comment:
Even with #11483, this isn't working right. It should, though - see
Barton's post at the Maxima ticket:
{{{
By the way:
(%i4) load(abs_integrate)$
Correct antiderivative:
(%i5) 'integrate(x*signum(x^2-1/4),x);
(%o5) abs(x^2-1/4)/2
Correct definite integral
(%i6) 'integrate(x*signum(x^2-1/4),x,-1,0);
(%o6) -1/4
}}}
so I'm not sure why this is still returning the "wrong" thing. Probably
something about the integration code...
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11590#comment:3>
Sage <http://www.sagemath.org>
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