# XMod

Crossed Modules and Cat1-Groups

Version 2.62

This project is maintained by Christopher D. Wensley

                       README file for the XMod package
================================

Introduction
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This package allows for computation with crossed modules; cat1-groups; morphisms of these structures; derivations of crossed modules and the corresponding sections of cat1-groups.
Experimental functions for crossed squares are now included.
In October 2015 a new section on isoclinism of crossed modules was added.

Distribution
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The XMod'' package is distributed with the accepted GAP packages, see:
http://www.gap-system.org/Packages/xmod.html
It may also be obtained from the GitHub repository at:
http://gap-packages.github.io/xmod/

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XMod is free software; you can redistribute it and/or modify
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

Installation
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1) unpack xmod-.tar.gz' in the pkg' subdirectory of the GAP root directory.
2) From within GAP load the package with:
`