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# GUAVA

## A GAP4 Package for computing with error-correcting codes

Version 3.16

April, 2022

Jasper Cramwinckel

Erik Roijackers

Reinald Baart

Eric Minkes

Lea Ruscio

Robert L Miller

Tom Boothby

Cen (CJ'') Tjhai

David Joyner

Joe Fields (Maintainer)
Email: fieldsj1@southernct.edu
Homepage: http://giam.southernct.edu/
Mathematics Department,
Southern Connecticut State University,
New Haven, CT,
06515 USA.

GUAVA: © The GUAVA Group: 1992-2003 Jasper Cramwinckel, Erik Roijackers,Reinald Baart, Eric Minkes, Lea Ruscio (for the tex version), Jeffrey Leon © 2004 David Joyner, Cen Tjhai, Jasper Cramwinckel, Erik Roijackers, Reinald Baart, Eric Minkes, Lea Ruscio. © 2007 Robert L Miller, Tom Boothby © 2009, 2012, 2016, 2018, 2022 Joe Fields

GUAVA is released under the GNU General Public License (GPL).

GUAVA 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.

GUAVA is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with GUAVA; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

For many years GUAVA has been released along with the backtracking'' C programs of J. Leon. In one of his *.c files the following statements occur: Copyright (C) 1992 by Jeffrey S. Leon. This software may be used freely for educational and research purposes. Any other use requires permission from the author.'' The following should now be appended: I, Jeffrey S. Leon, agree to license all the partition backtrack code which I have written under the GPL (www.fsf.org) as of this date, April 17, 2007.''

GUAVA documentation: © Jasper Cramwinckel, Erik Roijackers, Reinald Baart, Eric Minkes, Lea Ruscio (for the tex version), Joe Fields, David Joyner, Cen Tjhai. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

### Acknowledgements

GUAVA was originally written by Jasper Cramwinckel, Erik Roijackers, and Reinald Baart in the early-to-mid 1990's as a final project during their study of Mathematics at the Delft University of Technology, Department of Pure Mathematics, under the direction of Professor Juriaan Simonis. This work was continued in Aachen, at Lehrstuhl D fur Mathematik. In version 1.3, new functions were added by Eric Minkes, also from Delft University of Technology.

JC, ER and RB would like to thank the GAP people at the RWTH Aachen for their support, A.E. Brouwer for his advice and J. Simonis for his supervision.

The GAP 4 version of GUAVA (versions 1.4 and 1.5) was created by Lea Ruscio and (from 2001, starting with version 1.6, to early 2009) was maintained by David Joyner, who (with the help of several students) added several new functions. Starting with version 2.7, the best linear code'' tables for binary codes have been updated. From 2009, starting with version 3.10, GUAVA has been maintained by Joe Fields. For further details, see the CHANGES file in the GUAVA directory, also available at https://gap-packages.github.io/guava/CHANGES.guava.

This documentation was prepared with the GAPDoc package of Frank Lübeck and Max Neunhöffer. The conversion from TeX to GAPDoc's XML was done by David Joyner in 2004.

Please send bug reports, suggestions and other comments about GUAVA to support@gap-system.org. Currently known bugs and suggested GUAVA projects are listed on the bugs and projects web page https://gap-packages.github.io/guava/guava2do.html. Older releases and further history can be found on the GUAVA web page https://gap-packages.github.io/guava/.

Contributors: Other than the authors listed on the title page, the following people have contributed code to the GUAVA project: Alexander Hulpke, Steve Linton, Frank Lübeck, Aron Foster, Wayne Irons, Clifton (Clipper) Lennon, Jason McGowan, Shuhong Gao, Greg Gamble and Jeffrey S. Leon.

For documentation on Leon's programs, see the src/leon/doc subdirectory of GUAVA.

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