#11139: Ideal with no generators for univariate polynomial rings
-----------------------------------+----------------------------------------
Reporter: mraum | Owner: malb
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.7
Component: commutative algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Consider the following (Sage 4.7alpha1) :
{{{
sage: P.<a> = QQ[]
sage: P.ideal([])
Booom!
}}}
The issue is twofold: The ideal method in rings/rings.py is called and
does not accept an empty list. But also the univariate polynomial rings
should call a specialized method just like the multivariate ones do.
I make this a block, as it worked in earlier versions (like 4.2 or so) and
is a construction that easily comes up as a corner case.
The patch attached solves the issue, but it is a patch created in 30
seconds. I am sorry that I currently don't have time to deal with this.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11139>
Sage <http://www.sagemath.org>
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