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# 6 Copyright Notice

Copyright © (1987--2004) by the GAP Group,

incorporating the Copyright © 1999, 2000 by School of Mathematical and Computational Sciences, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, Scotland

being the Copyright © 1992 by Lehrstuhl D für Mathematik, RWTH, 52056 Aachen, Germany, transferred to St Andrews on July 21st, 1997.

except for files in the distribution, which have an explicit different copyright statement. In particular, the copyright of packages distributed with GAP is usually with the package authors or their institutions.

GAP 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 the file `GPL` in the `etc` directory of the GAP distribution or see http://www.gnu.org/licenses/gpl.html

If you obtain GAP please send us a short notice to that effect, e.g., an e-mail message to the address support@gap-system.org, containing your full name and address. This allows us to keep track of the number of GAP users.

If you publish a mathematical result that was partly obtained using GAP, please cite GAP, just as you would cite another paper that you used (see below for sample citation). Also we would appreciate if you could inform us about such a paper.

Specifically, please refer to

    [GAP] The GAP Group, GAP --- Groups, Algorithms, and Programming,
          Version 4.4.5; 2005
          (http://www.gap-system.org)

GAP is distributed by us without any warranty, to the extent permitted by applicable state law. We distribute GAP as is without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

The entire risk as to the quality and performance of the program is with you. Should GAP prove defective, you assume the cost of all necessary servicing, repair or correction.

In no case unless required by applicable law will we, and/or any other party who may modify and redistribute GAP as permitted above, be liable to you for damages, including lost profits, lost monies or other special, incidental or consequential damages arising out of the use or inability to use GAP.

You are permitted to modify and redistribute GAP, but you are not allowed to restrict further redistribution. That is to say proprietary modifications will not be allowed. We want all versions of GAP to remain free.

If you modify any part of GAP and redistribute it, you must supply a `README` document. This should specify what modifications you made in which files. We do not want to take credit or be blamed for your modifications.

Of course we are interested in all of your modifications. In particular we would like to see bug-fixes, improvements and new functions. So again we would appreciate it if you would inform us about all modifications you make.

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GAP 4 manual
May 2005