#9760: Possible numerical noise doctest failure in sage/matrix/matrix2.pyx on t2
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Reporter: mpatel | Owner: drkirkby
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.5.3
Component: solaris | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Reported by John Palmieri on [http://groups.google.com/group/sage-
release/browse_thread/thread/67feb1b840ff2710/90a82acffe8f10de#90a82acffe8f10de
sage-release]:
{{{
On t2, I'm getting a failure:
sage -t -long devel/sage/sage/matrix/matrix2.pyx
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File "/home/palmieri/t2/sage-4.5.3.alpha1/devel/sage-main/sage/matrix/
matrix2.pyx", line 6406:
sage: all(imag(e) < 1e-15 for e in eigs)
Expected:
True
Got:
False
This looks like numerical noise: if I replace 1e-15 by 1e-14, it passes.
Has anyone else seen this? Could it possibly be dependent on ATLAS (e.g.,
the load on the system when it's tuning itself)?
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9760>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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