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# The GAP
4 package
'IdRel'
## Introduction
The
'IdRel' package
is designed
for computing the identities among relations
of a group presentation
using rewriting, logged rewriting,
monoid polynomials,
module polynomials
and Y-sequences.
## History
Version
1.
001 of 'IdRel' formed part
of Anne Heyworth
's PhD thesis in
December
1999.
Version
2.
02 was prepared
for the GAP
4.
4 release
in March
2006
and deposited
in the incoming directory
on the St Andrews ftp server.
A more detailed history will be included
as Chapter
6 of the manual.
'IdRel' became an accepted package
in May
2015.
## Distribution
The
'IdRel' package
is distributed with the accepted GAP packages.
It may also be obtained
from the GitHub repository
at:
<
https://gap-packages.github.io/idrel/>
## Copyright
The
'IdRel' package
is Copyright © Chris Wensley
and Anne Heyworth,
1999--
2025.
'IdRel' 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 `idrel-<version_number>.tar.gz` in the `pkg` subdirectory
of the GAP root directory.
* From within GAP load the package with:
```
gap> LoadPackage(
"idrel");
true
```
* The documentation is in the `doc` subdirectory.
* To run the test file read `testall.g` from the `idrel/tst/` directory.
## Contact
If you have a question relating
to 'IdRel', encounter
any problems,
or have a suggestion
for extending the package
in any way, please
* email: <mailto:cdwensley.maths@btinternet.com>
* or report an issue at the GitHub issue tracker:
<
https://github.com/gap-packages/idrel/issues/new>