GAP Package SmallClassNr

The SmallClassNr package provides access to finite groups with small class number. Currently, the package contains all finite groups of class number at most 14, and most finite groups with class numbers 15 to 20.

The current version of this package is version 1.6.0, released on 2026-07-29. For more information, please refer to the package manual. There is also a README file.

License: GPL-2.0-or-later

Dependencies

This package requires GAP version >= 4.14

The following additional GAP packages are not required, but suggested:

smallgrp 1.5.4

Author

Sam Tertooy.

Citing

Please, cite this package as

[Ter26] Tertooy, S., SmallClassNr, Library of finite groups with small class number, Version 1.6.0 (2026)
(GAP package), https://stertooy.github.io/SmallClassNr.

You can get more info by typing Cite("SmallClassNr"); in the gap prompt.

Feedback

For bug reports, feature requests and suggestions, please use the issue tracker.