#10483: Deprecate the misuse of symbolic variables as polynomial variable
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner: AlexGhitza
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: basic arithmetic | Resolution:
Keywords: deprecation | Merged in:
symbolic polynomial variable | Reviewers: Karl-Dieter Crisman
Authors: Simon King, Ralf | Work issues:
Stephan | Commit:
Report Upstream: N/A | 649f6fb728c51f319a369046490afcda8d367ac7
Branch: public/10483-2 | Stopgaps:
Dependencies: |
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Changes (by jdemeyer):
* status: needs_review => needs_work
Comment:
Replying to [comment:31 nbruin]:
> This example:
> {{{
> sage: R.<xx> = QuotientRing(QQ['x'], QQ['x'].ideal(x^2 + 1)); R
> }}}
> is still referring to a wild `x` for the ideal generator. The meaning of
this code really depends on what `x` happens to be bound to before. I
don't see another way than to write this code in multiple steps:
> {{{
> sage: P.<x> = QQ[]; R.<xx> = QuotientRing(P, P.ideal(x^2 + 1)); R
> }}}
> In fact, if you put that on one line, it's hardly longer anyway. It
might be better style to split it, though.
Yes, please split it:
{{{
sage: P.<x> = QQ[]
sage: R.<xx> = QuotientRing(P, P.ideal(x^2 + 1))
sage: R
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/10483#comment:33>
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