#13670: Inversion in polynomial quotient rings could give clearer error message
when element is non-invertible
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Reporter: Bouillaguet | Owner: malb
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-5.5
Component: commutative algebra | Resolution:
Keywords: polynomial rings | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Charles Bouillaguet | Merged in:
Dependencies: #13671 | Stopgaps:
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Comment (by mstreng):
Replying to [comment:2 mstreng]:
ps. compare this:
> {{{
> sage: R.<x,y> = QQ[]
> sage: S = R.quotient_ring(R.ideal(x^2, y))
> sage: 0/S(x)
> 0
> }}}
to this:
{{{
sage: P.<x> = QQ[]
sage: S = P.quotient_ring(x^2)
sage: 0/S(x)
ZeroDivisionError: element xbar of quotient polynomial ring not invertible
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13670#comment:3>
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