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idrel

Identities among relations

2.41

18 March 2018

Anne Heyworth

Christopher D. Wensley
Email: c.d.wensley@bangor.ac.uk
Homepage: http://pages.bangor.ac.uk/~mas023/
Address:
Dr. C.D. Wensley
School of Computer Science
Bangor University
Dean Street
Bangor
Gwynedd LL57 1UT
UK

Abstract

IdRel is a GAP package originally implemented in 1999, using the GAP 3 language, when the first author was studying for a Ph.D. in Bangor.

This package is designed to compute a minimal set of generators for the module of the identities among relators of a group presentation. It does this using

IdRel became an accepted GAP package in May 2015.

Bug reports, suggestions and comments are, of course, welcome. Please contact the last author at c.d.wensley@bangor.ac.uk or submit an issue at the GitHub repository https://github.com/gap-packages/idrel/issues/.

Copyright

© 1999-2018 Anne Heyworth and Chris Wensley

The IdRel package 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.

Acknowledgements

This documentation was prepared with the GAPDoc [LN17] and AutoDoc [GH17] packages.

The procedure used to produce new releases uses the package GitHubPagesForGAP [Hor14] and the package ReleaseTools.

Contents

1 Introduction
2 Rewriting Systems
3 Logged Rewriting Systems
4 Monoid Polynomials
5 Module Polynomials
6 Identities Among Relators
References
Index

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