#13053: wrong sign in square-free decomposition of polynomials over ZZ
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Reporter: saraedum | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone: sage-5.1
Component: factorization | Resolution:
Keywords: sd40.5 FLINT NTL ZZ | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by saraedum):
The problem is that the FLINT/NTL return a different content:
{{{
sage: R.<x> = PolynomialRing(ZZ,implementation="FLINT")
sage: (-x).content()
1
sage: R.<x> = PolynomialRing(ZZ,implementation="NTL")
sage: (-x).content()
-1
}}}
If the content should just be a generator of the ideal generated by the
coefficients, then both are correct. Personally, I think that NTL's
behaviour is more intuitive though.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13053#comment:2>
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