GAP Package XMod

The XMod package provides a collection of functions for computing with crossed modules and cat1-groups, their derivations and sections, morphisms of these structures, and higher-dimensional generalisations.

The current version of this package is version 2.93, released on 2025-04-27. 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 >=4.11.0

The following other GAP packages are needed:

• utils >= 0.81
• groupoids >= 1.73
• HAP >= 1.29
• AutPGrp >= 1.10.2
• SmallGrp >= 1.4.2

Authors

Chris Wensley, Murat Alp, Alper Odabas, Enver Onder Uslu.

Citing

Please, cite this package as

[WAOU25] Wensley, C., Alp, M., Odabas, A. and Uslu, E. O., XMod, Crossed Modules and Cat1-Groups, Version 2.93 (2025)
(GAP package), http://gap-packages.github.io/xmod/.

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

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Feedback

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