FGA

                     Free Group Algorithms

                        A GAP 4 package


Contents:
---------

The FGA package provides methods for computations with finitely
generated subgroups of free groups.

It allows you to (constructively) test membership and conjugacy,
and to compute free generators, the rank, the index, normalizers,
centralizers, and intersections where the groups involved are finitely
generated subgroups of free groups.

In addition, it provides generators and a finite presentation for the
automorphism group of a finitely generated free group and allows to
write any such automorphism as word in these generators.


Requirements:
-------------

FGA is written for GAP version 4.8 or later.
It does not use external programs and does not depend on
system specifics.


License:
--------

The FGA package is free software and can be redistributed and/or
modified under the terms of the GNU General Public License.
For details see the file COPYING.


Installation:
-------------

The installation follows standard GAP rules.
So the normal way to install is to unpack the archive in the `pkg'
directory, which will create an `fga' subdirectory.


Enjoy!