#17190: Error in conversion from RR['x,y'] to RR['x']
---------------------------------------+------------------------
Reporter: defeo | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: commutative algebra | Resolution:
Keywords: polynomials RR | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
---------------------------------------+------------------------
Description changed by defeo:
Old description:
> Conversion of univariate polynomials from the bivariate ring `RR['x,y']`
> fails:
>
> {{{
> sage: RR[wiki:'x' x](RR[wiki:'x,y' x,y].0)~~
>
> ----
> ValueError Traceback (most recent call
> last)
> ...
> ValueError: max() arg is an empty sequence
> }}}
>
> This does not seem to affect other rings:
>
> {{{
> sage: QQ[wiki:'x' x](QQ[wiki:'x,y' x,y].0)
> x
> sage: CC[wiki:'x' x](CC[wiki:'x,y' x,y].0)
> x
> sage: RDF[wiki:'x' x](RDF[wiki:'x,y' x,y].0)
> x
> }}}
New description:
Conversion of univariate polynomials from the bivariate ring `RR['x,y']`
fails:
{{{
sage: RR['x'](RR['x,y'].0)
----
ValueError Traceback (most recent call
last)
...
ValueError: max() arg is an empty sequence
}}}
This does not seem to affect other rings:
{{{
sage: QQ['x'](QQ['x,y'].0)
x
sage: CC['x'](CC['x,y'].0)
x
sage: RDF['x'](RDF['x,y'].0)
x
}}}
--
--
Ticket URL: <http://trac.sagemath.org/ticket/17190#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
