#10581: change Large Cremona database format and extend it
-------------------------------+--------------------------------------------
Reporter: gagansekhon | Owner: cremona
Type: enhancement | Status: new
Priority: minor | Milestone: sage-5.0
Component: elliptic curves | Keywords: cremona, stein, watkins,
elliptic curves, database
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by cremona):
Regarding 1 & 3: I am making good progress on Sage scripts to compute all
the data in all the old-style files (i.e. tables 1-8) taking as input
just the "short" version of Table 1 (with only the optimal curve from each
class). There is no reason why these would not also work on the S-W
database curves. The only assumption is that the input file contains
lines like
{{{
11 a 1 [0,-1,1,-10,-20] 0 5
}}}
where the first 3 fields are the label (in three parts, and the third part
==1 for optimal curves), then follow the a-invariants and the analytic
rank and the torsion order. (The latter could be omitted as it is easily
recomputed, but not the rank!)
I will attach a file I wrote at MSRI last June which gives the exact
specification of the content of the 7 file types, for reference.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10581#comment:4>
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