Math-PlanePath is Copyright 2010, 2011 Kevin Ryde

Math-PlanePath is licensed under the GNU Public License GPL version 3
or at your option any later version.  The complete text of GPL version
3 is in the file

    /usr/share/common-licenses/GPL-3

The program home page is

    http://user42.tuxfamily.org/math-planepath/index.html