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# The GAP
4 package XModAlg
## Introduction
This package allows
for computation
with crossed modules
of commutative algebras; cat1-alge
bras; and morphisms of these structures.
## Distribution
* The 'XModAlg' package is distributed with the deposited GAP packages, see:
<https://www.gap-system.org/Packages/xmodalg.html>
* It will, in due course, be available from the GitHub repository at:
<https://gap-packages.github.io/xmodalg/>
## Copyright
The 'XModAlg' package is Copyright © Zekeriya Arvasi and Alper Odabas et al, 2014--2025.
'XModAlg' is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
For details, see <https://www.gnu.org/licenses/gpl.html>.
## Installation
* unpack `xmod-<version_number>.zip` in the `pkg` subdirectory of the GAP root directory.
* From within GAP load the package with:
```
gap> LoadPackage("XModAlg");
true
```
* The file `manual.pdf` is in the `doc` subdirectory.
## Contact
If you have a question relating to 'XModAlg', encounter any problems, or have a suggestion for extending the package in any way, please
* report an issue at: <https://github.com/gap-packages/xmodalg/issues/new>
* or email: <mailto:aodabas@ogu.edu.tr>
[Dauer der Verarbeitung: 0.2 Sekunden, vorverarbeitet 2026-10-20]