#10803: critical bug in real_roots
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Reporter: zimmerma | Owner: jason, jkantor
Type: defect | Status: new
Priority: critical | Milestone: sage-4.7.3
Component: numerical | Keywords: real roots
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by jdemeyer):
Replying to [comment:12 zimmerma]:
> I'm concerned by the fact that this ticket was delayed twice (first from
4.7 to 4.7.1, now
> from 4.7.2 to 4.7.3, btw why is there no trace of the change from 4.7.1
to 4.7.2) and moreover
> the priority is now changed from blocker to critical, without any
justification.
Well, it seems nobody really cares much to solve this problem. I have
glanced at the code and it's also hard to understand what is going on.
Personally I don't think this should a "blocker". Simple mathematical
bugs are almost never blockers. This `real_roots()` code is also not the
default real-root computing code. If you simply do `pol.roots(ring=RR)`,
this will use PARI and not this buggy code (there could still be bugs in
PARI though).
> Is Carl Witty (who wrote the real_roots code as far as I know) still out
there?
AFAIK, he is not really into Sage development anymore.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10803#comment:13>
Sage <http://www.sagemath.org>
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