#19130: inconsistencies of .subs() for multivariate polynomials
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Reporter: vdelecroix | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.9
Component: algebra | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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{{{
sage: R.<x,y,z> = ZZ[]
sage: x.subs({x:1}).parent()
Multivariate Polynomial Ring in x, y, z over Integer Ring
sage: x.subs({x:1, y:1, z:1}).parent()
Multivariate Polynomial Ring in x, y, z over Integer Ring
}}}
compared to the univariate case
{{{
sage: R.<t> = ZZ[]
sage: t.subs({t:1}).parent()
Integer Ring
}}}
Note also that we have
{{{
sage: x.subs({x:RDF(1)}).parent()
Real Double Field
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19130>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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