LINK Copyright
--------------
Copyright (c) 1996 DIMACS Center, Rutgers, The State University of New Jersey
                   and 1998 Elon College, North Carolina

This software is copyrighted by the DIMACS Center at Rutgers, The State
University of New Jersey and Elon College, North Carolina.  
IT IS PROVIDED AS IS, AND THE AUTHORS, DIMACS, AND 
RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY  AND ELON COLLEGE DISCLAIM
ALL LIABILITY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL 
DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

The authors hereby grant permission to use, copy, modify, and distribute 
this software for any purpose.  However, fees for distribution or use of this
software or derived works may not be charged without the written
permission of the copyright holder.  


==============================================================================

TK/TCL Copyright 
----------------
Copyright (c) 1987-1993 The Regents of the University of California.
Copyright (c) 1994 Sun Microsystems, Inc.

This software is copyrighted by the Regents of the University of
California, Sun Microsystems, Inc., and other parties.  The following
terms apply to all files associated with the software unless explicitly
disclaimed in individual files.

The authors hereby grant permission to use, copy, modify, distribute,
and license this software and its documentation for any purpose, provided
that existing copyright notices are retained in all copies and that this
notice is included verbatim in any distributions. No written agreement,
license, or royalty fee is required for any of the authorized uses.
Modifications to this software may be copyrighted by their authors
and need not follow the licensing terms described here, provided that
the new terms are clearly indicated on the first page of each file where
they apply.

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE
IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE
NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
MODIFICATIONS.

RESTRICTED RIGHTS: Use, duplication or disclosure by the government
is subject to the restrictions as set forth in subparagraph (c) (1) (ii)
of the Rights in Technical Data and Computer Software Clause as DFARS
252.227-7013 and FAR 52.227-19.


Siod Copyright
--------------

/* Scheme In One Defun, but in C this time.
 
 *                      COPYRIGHT (c) 1988-1992 BY                          *
 *        PARADIGM ASSOCIATES INCORPORATED, CAMBRIDGE, MASSACHUSETTS.       *
 *			   ALL RIGHTS RESERVED                              *

Permission to use, copy, modify, distribute and sell this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all copies
and that both that copyright notice and this permission notice appear
in supporting documentation, and that the name of Paradigm Associates
Inc not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.

PARADIGM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
PARADIGM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

*/

Tiny CLOS copyright
-------------------

;;; Copyright (c) 1992 Xerox Corporation.	 
;;;; All Rights Reserved.	
;;;
;;; Use, reproduction, and preparation of derivative works are permitted.
;;; Any copy of this software or of any derivative work must include the
;;; above copyright notice of Xerox Corporation, this paragraph and the
;;; one after it.	 Any distribution of this software or derivative works
;;; must comply with all applicable United States export control laws.
;;;
;;; This software is made available AS IS, and XEROX CORPORATION DISCLAIMS
;;; ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;;; PURPOSE, AND NOTWITHSTANDING ANY OTHER PROVISION CONTAINED HEREIN, ANY
;;; LIABILITY FOR DAMAGES RESULTING FROM THE SOFTWARE OR ITS USE IS
;;; EXPRESSLY DISCLAIMED, WHETHER ARISING IN CONTRACT, TORT (INCLUDING
;;; NEGLIGENCE) OR STRICT LIABILITY, EVEN IF XEROX CORPORATION IS ADVISED
;;; OF THE POSSIBILITY OF SUCH DAMAGES.



and finally

STk Copyright
-------------

/*
 * Copyright (C) 1993,1994,1995 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
 * 
 *
 * Permission to use, copy, and/or distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that both the above copyright notice and this permission notice appear in
 * all copies and derived works.  Fees for distribution or use of this
 * software or derived works may only be charged with express written
 * permission of the copyright holder.  
 * This software is provided ``as is'' without express or implied warranty.
 *
 * This software is a derivative work of other copyrighted softwares; the
 * copyright notices of these softwares are placed in the file COPYRIGHTS
 *
 */

Nauty is used for isomorphism testing.  Here is the Nauty copyright
information:
/*****************************************************************************
*                                                                            *
*    AUTHOR: Brendan D. McKay                                                *
*            Computer Science Department, Australian National University,    *
*            GPO Box 4, Canberra, Australia 0200                             *
*            phone:  +61 6 249 3845    fax:  +61 6 249 0010                  *
*            email:  bdm@cs.anu.edu.au                                       *
*                                                                            *
*   Copyright (1984-1993) Brendan McKay.  All rights reserved.  Permission   *
*   is hereby given for use and/or distribution with the exception of        *
*   sale for profit or application with nontrivial military significance.    *
*   You must not remove this copyright notice, and you must document any     *
*   changes that you make to this program.                                   *
*   This software is subject to this copyright only, irrespective of         *
*   any copyright attached to any package of which this is a part.           *
*                                                                            *
*   This program is only provided "as is".  No responsibility will be taken  *
*   by the author, his employer or his pet rabbit* for any misfortune which  *
*   befalls you because of its use.  I don't think it will delete all your   *
*   files, burn down your computer room or turn your children against you,   *
*   but if it does: stiff cheddar.  On the other hand, I very much welcome   *
*   bug reports, or at least I would if there were any bugs.                 *
*                                                       * RIP, 1989          *
*                                                                            *
*   If you wish to acknowledge use of this program in published articles,    *
*   please do so by citing the User's Guide:                                 *
*                                                                            *
*     B. D. McKay, nauty User's Guide (Version 1.5), Technical Report        *
*         TR-CS-90-02, Australian National University, Department of         *
*         Computer Science, 1990.                                            *
