#15614: Update Cremona's table of elliptic curves to 320000
-------------------------------------+-------------------------------------
Reporter: cremona | Owner: cremona
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: packages: | Resolution:
optional | Merged in:
Keywords: elliptic curve | Reviewers: Jeroen Demeyer
database | Work issues:
Authors: John Cremona | Commit:
Report Upstream: N/A | 6f0430bd73c0cd8bec0764c7b7b706cc4963a4c4
Branch: | Stopgaps:
u/jdemeyer/ticket/15614 |
Dependencies: #15556 |
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Comment (by cremona):
Replying to [comment:22 jdemeyer]:
> John, I am preparing a small reviewer patch (mostly fixing some
documentation).
>
> However, I noticed the following in `src/sage/databases/cremona.py`:
> {{{
> EXAMPLES::
>
> sage: c = CremonaDatabase()
> sage: c.elliptic_curve_from_ainvs([0, -1, 1, -10, -20])
> Elliptic Curve defined by y^2 + y = x^3 - x^2 - 10*x - 20
over Rational Field
> sage: c.elliptic_curve_from_ainvs([1, 0, 0, -101, 382]) #
optional - database_cremona_ellcurve
> Elliptic Curve defined by y^2 + x*y = x^3 - 101*x + 382 over
Rational Field
>
> Old (pre-2006) Cremona labels are not allowed::
>
> sage: c.elliptic_curve('9450KKKK1')
> Elliptic Curve defined by y^2 + x*y + y = x^3 - x^2 - 5*x +
7 over Rational Field
> }}}
> Is the "not allowed" simply a typo for "allowed" or is something deeper
going on?
It's a typo. I think it used to be true that the old labels were not
allowed and this test showed an error. It was probably me who changed
that to a working test but slipped up.
I approve of your other changes, so if you would remove "not" we can
proceed. Thanks!
--
Ticket URL: <http://trac.sagemath.org/ticket/15614#comment:25>
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