database_cremona_ellcurve: Database of elliptic curves - Packages and Features

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# database_cremona_ellcurve: Database of elliptic curves

## Description

John Cremona’s database of elliptic curves

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

This is an optional package, not included by default.

## License

Public Domain

## Upstream Contact

- Author: John Cremona

- Email: john.cremona@gmail.com

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

## Update Instructions

Get an up-to-date copy of the git repository ecdata from https://github.com/JohnCremona/ecdata.

If the cremona database has already been installed, remove `SAGE_DATA/cremona/cremona.db`. Then run

The build script expects to find the files in subfolders allcurves, allgens, degphi and allbsd of the ecdata folder. It extracts them and builds the new cremona.db file from the contents.

Finally, copy `SAGE_DATA/cremona/cremona.db` to the src directory of the spkg.

## Type

optional

## Dependencies

## Version Information

package-version.txt:

    20190911

## Equivalent System Packages

See https://repology.org/project/sage-data-cremona-ellcurve/versions, https://repology.org/project/sagemath-database-cremona-elliptic-curves/versions

However, these system packages will not be used for building Sage because `spkg-configure.m4` has not been written for this package; see Issue #27330 for more information.