GMPY2 is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

GMPY2 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 Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public
License along with GMPY2; if not, see <http://www.gnu.org/licenses/>

On Debian systems, the full text of the GNU Lesser General Public
License version 3 can be found in the file
`/usr/share/common-licenses/LGPL-3'.