#16313: easy-to-fix mistake in the stein-watkins optional database docs
-------------------------------------+-------------------------------------
Reporter: was | Owner:
Type: defect | Status: needs_review
Priority: trivial | Milestone: sage-6.4
Component: packages: huge | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: Fixed upstream, | Work issues:
but not in a stable release. | Commit:
Branch: | 2ae0cdae93b928cb227f2ada7538efbad5d417f8
u/jdemeyer/ticket/16313 | Stopgaps:
Dependencies: |
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Changes (by jdemeyer):
* cc: was (added)
* upstream: Completely fixed; Fix reported upstream => Fixed upstream, but
not in a stable release.
Old description:
> {{{
> Hi William,
>
> I just downloaded the sage version of the Stein-Watkins database of (a
> subset of) the elliptic curves of conductor < 10^8, because I need a
> supply of small curves with large rational torsion subgroups. I looked
> in
>
> sage/local/share/stein_watkins/format.txt
>
> and it says that the torsion subgroup is given as follows:
>
> torsion_subgroup - n or nx, where n means Z/nZ and nx means Z/2Z x
> Z/2nZ.
>
> But in the actual tables, nx seems to indicate Z/2Z x Z/nZ (instead of
> 2nZ), because the values that appear are 2x, 4x, 6x, and 8x.
>
> I hope all is well with you! Thanks ---
>
> -- Everett
> }}}
>
> New '''upstream package''':
> [http://boxen.math.washington.edu/home/jdemeyer/spkg/database_stein_watkins-20110713.tar.gz]
New description:
{{{
Hi William,
I just downloaded the sage version of the Stein-Watkins database of (a
subset of) the elliptic curves of conductor < 10^8, because I need a
supply of small curves with large rational torsion subgroups. I looked in
sage/local/share/stein_watkins/format.txt
and it says that the torsion subgroup is given as follows:
torsion_subgroup - n or nx, where n means Z/nZ and nx means Z/2Z x
Z/2nZ.
But in the actual tables, nx seems to indicate Z/2Z x Z/nZ (instead of
2nZ), because the values that appear are 2x, 4x, 6x, and 8x.
I hope all is well with you! Thanks ---
-- Everett
}}}
We simply need the updated `format.txt` from
[http://modular.math.washington.edu/ecdb/]
New '''upstream package''':
[http://boxen.math.washington.edu/home/jdemeyer/spkg/database_stein_watkins-20110713.tar.gz]
--
--
Ticket URL: <http://trac.sagemath.org/ticket/16313#comment:7>
Sage <http://www.sagemath.org>
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