#8612: potentially horrible multimodular matrix echelon bug
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Reporter: was | Owner: was
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-4.4
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by rbeezer):
In
{{{
d = E.denominator()
hdE = long(E.height())
if True or hdE * self.ncols() * height < prod:
break
}}}
does d need to multiply E.height() at some point in the computation of
hdE?
It seems so in the algorithm as outlined in step (5) in the docstring.
And if not, does d then not need to be computed? Hopefully, there's
something mildly amiss here, but I've not studied the whole routine
carefully.
Rob
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8612#comment:2>
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