Copyright &copyright; (1987-&RELEASEYEAR;) by the &GAP; Group,

incorporating the Copyright &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 &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. This helps 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, which we will add to the &GAP; http://www.gap-system.org/Doc/Bib/bib.html.

Specifically, please refer to

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

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.

In addition to the general copyright for &GAP; set forth above, the following terms apply to the versions of &GAP; for Windows.

The executable of &GAP; for Windows that we distribute was compiled with the gcc compiler supplied with `Cygwin` installation (http://cygwin.com/).

The GNU C compiler is

Copyright &copyright; 2010 Free Software Foundation, Inc.

under the terms of the GNU General Public License (GPL).

The `Cygwin` API library is also covered by the GNU GPL. The executable we provide is linked against this library (and in the process includes GPL'd `Cygwin` glue code). This means that the executable falls under the GPL too, which it does anyhow.

The cyggcc_s-1.dll, cygncurses-10.dll, cygncursesw-10.dll, cygpanel-10.dll, cygpopt-0.dll, cygreadline7.dll, cygstart.exe, cygwin1.dll, libW11.dll, mintty.exe, rxvt.exe and regtool.exe are taken unmodified from the `Cygwin` distribution. They are copyright by RedHat Software and released under the GPL. For more information on `Cygwin`, see http://www.cygwin.com.

Please contact support@gap-system.org if you need further information.