Crossed Modules and Cat1-Groups

Version 2.88
Released 2022-04-28

This project is maintained by Chris Wensley

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 2.88, released on 2022-04-28. For more information, please refer to the package manual. There is also a README file.


This package requires GAP version >=4.11.0

The following other GAP packages are needed:

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


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


Please, cite this package as

[WAOU22] Wensley, C., Alp, M., Odabas, A. and Uslu, E. O., XMod, Crossed Modules and Cat1-Groups, Version 2.88 (2022)
(Refereed GAP package), https://gap-packages.github.io/xmod/.

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


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