#7711: integral() does not reduce coefficients in finite field
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Reporter: zimmerma | Owner: malb
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: commutative algebra | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Alex Ghitza | Merged in:
Dependencies: | Stopgaps:
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Comment (by zimmerma):
Alex,
there is something I don't understand with your patch. You check that
{{{right}}} is in the base
ring, but not {{{1/right}}}, thus what happens the base ring is not a
field? Compare for example:
{{{
sage: P.<x,z> = PolynomialRing(ZZ)
sage: Q.<y> = PolynomialRing(P)
sage: p=x+y+z
sage: t=p/2
sage: t.parent()
Univariate Polynomial Ring in y over Multivariate Polynomial Ring in x, z
over Rational Field
sage: u=p.integral()
sage: u.parent()
Univariate Polynomial Ring in y over Fraction Field of Multivariate
Polynomial Ring in x, z over Integer Ring
}}}
Why do t and u have different parents?
Paul
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7711#comment:11>
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