2.48
27 August 2024
Anne Heyworth
Chris Wensley
Email: cdwensley.maths@btinternet.com
Homepage: https://github.com/cdwensley
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
rewriting and logged rewriting: a self-contained implementation of the Knuth-Bendix process using the monoid presentation associated to the group presentation;
monoid polynomials: an implementation of the monoid ring;
module polynomials: an implementation of the right module over this monoid generated by the relators.
Y-sequences: used as a rewriting way of representing elements of a free crossed module (products of conjugates of group relators and inverse relators).
IdRel became an accepted GAP package in May 2015.
Bug reports, suggestions and comments are, of course, welcome. Please contact the last author at cdwensley.maths@btinternet.com or submit an issue at the GitHub repository https://github.com/gap-packages/idrel/issues/.
© 1999-2024 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.
This documentation was prepared using the GAPDoc [LN17] and AutoDoc [GH17] packages.
The procedure used to produce new releases uses the package GitHubPagesForGAP [Hor14] and the package ReleaseTools.
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