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sagemath
GitHub Repository: sagemath/sagesmc
 Path: blob/master/build/pkgs/database_cremona_ellcurve/SPKG.txt
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= database_cremona_ellcurve =

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== Description ==

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John Cremona's database of elliptic curves

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See https://github.com/JohnCremona/ecdata

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This is an optional package, not included by default.

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== License ==

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Public Domain

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== SPKG Maintainers ==

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 * R. Andrew Ohana

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 * John Cremona

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== Dependencies ==

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None

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=== Patches ===

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 * None

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== Upstream Contact ==

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 * Author: John Cremona

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 * Email: [email protected]

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 * Website: http://homepages.warwick.ac.uk/staff/J.E.Cremona/

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== Update Instructions ==

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At the end of either method, copy `SAGE_DATA/cremona/cremona.db` to the src directory of the spkg.

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=== Method 1 ===

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If the cremona database has already been installed, remove

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`SAGE_DATA/cremona/cremona.db`. Run

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{{{

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sage: sage.databases.cremona.build('cremona','path/to/ecdata.tgz')

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}}}

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=== Method 2 ===

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Install the current version of the spkg, and copy the new files into a new

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folder. Then run

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{{{

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sage: C = sage.databases.cremona.LargeCremonaDatabase('cremona',False)

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sage: C._init_from_ftpdata('path/to/said/folder',0)

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}}}

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This method is much faster, but won't include any potential fixes old entries.

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