Bertini 2 depends on the following software and libraries:

==
Eigen
--
Eigen is available from http://eigen.tuxfamily.org/index.php?title=Main_Page

Eigen's license as of April 12, 2016 is MPL2, with some LGPL scattered in.  For more information, please consult
http://eigen.tuxfamily.org/index.php?title=FAQ#Licensing

The Mozilla Public License 2.0 has been included at b2/licenses/

==
GMP
--
The GNU Multiple Precision Library is available from https://gmplib.org/.

Since version 6, GMP is distributed under the dual licenses, GNU LGPL v3 and GNU GPL v2.

The GNU LGPL license has been included in Bertini 2 at b2/licenses/

==
MPFR
--
The GNU MPFR library is available from http://www.mpfr.org/.

MPFR is free. It is distributed under the GNU Lesser General Public License (GNU Lesser GPL), version 3 or later (2.1 or later for MPFR versions until 2.4.x).

==
Boost
--
The Boost C++ libraries are available from http://www.boost.org/.

Boost is available under the Boost License 1.0.  Please see http://www.boost.org/users/license.html.  A copy of the BPL has been included in b2/licenses.

==
Python
--
Python is available from https://www.python.org/.

Python versions 2 and 3 carry differing licenses.  Please see
https://www.python.org/download/releases/2.7/license/
and
https://docs.python.org/3/license.html

Copies of the Python licenses have not been included in Bertini 2 at this time.