#10575: coercing multivariate poly's with repeated variable name shouldn't be
allowed in some cases
-----------------------------------+----------------------------------------
Reporter: was | Owner: malb
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.1
Component: commutative algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Magma and Sage let us do this:
{{{
> R<x,x> := PolynomialRing(RationalField(),2);
> R.1*R.2;
x*x
}}}
{{{
sage: R.<x,x> = QQ[]
sage: f = R.0*R.1
sage: f
x*x
sage: magma(f)
x*x
sage: gp(f)
x^2
sage: pari(f)
x^2
sage: singular(f)
x^2
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10575>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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