#5982: [with patch, needs work] Can't construct fraction field
---------------------+------------------------------------------------------
Reporter: jmbr | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone: sage-4.0
Component: algebra | Keywords:
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Old description:
> {{{
> ----------------------------------------------------------------------
> | Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for
> the GUI, and license() for information. |
> ----------------------------------------------------------------------
>
> sage: R.<x, y> = PolynomialRing(QQ, 2) sage: I = (x^2 + y^2 - 1)*R
> sage: Q = R.quotient(I) sage: Q Quotient of Multivariate Polynomial
> Ring in x, y over Rational Field by the ideal (x^2 + y^2 - 1) sage:
> Q.fraction_field()
> ---------------------------------------------------------------------------
> NotImplementedError Traceback (most recent call last)
>
> ...
> }}}
New description:
{{{
----------------------------------------------------------------------
| Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for
the GUI, and license() for information. |
----------------------------------------------------------------------
sage: R.<x, y> = PolynomialRing(QQ, 2)
sage: I = (x^2 + y^2 - 1)*R
sage: Q = R.quotient(I)
Q Quotient of Multivariate Polynomial Ring in x, y over Rational Field by
the ideal (x^2 + y^2 - 1)
sage: Q.fraction_field()
---------------------------------------------------------------------------
NotImplementedError Traceback (most recent call last)
...
}}}
--
Comment(by mabshoff):
Hi,
M2 isn't a default part of Sage, so the doctest must be made optional. I
also don't see a reason why this cannot be implemented via libSingular for
example, but maybe I am overlooking things.
You also posted a diff, so please check in the code and post an hg patch
to properly preserve credit.
And since you are not listed at http://trac.sagemath.org/sage_trac/wiki
please add yourself there.
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5982#comment:4>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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