             Copyright (C) 1994-2002 
      The New York Group Theory Cooperative

    This program 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 program 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 this program; if
not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.

    For information from the authors, contact

    comment@rio.sci.ccny.cuny.edu

    NEW YORK GROUP THEORY COOPERATIVE
    Department of Mathematics
    City College of CUNY
    138 St at Convent Ave
    New York, NY 10031
