Spherogram
==========

Spherogram is a Python module for dealing with the kind of planar
diagrams that arise in 3-dimensional topology, such as link and
Heegaard diagrams. It a component of the larger
`SnapPy <http://snappy.computop.org>`_ project.  For some basic
examples of using Spherogram to build links, 
`see here <http://snappy.computop.org/spherogram.html>`_.  You can
browse the `source code <https://bitbucket.org/t3m/spherogram>`_.

Developed by 

* `Marc Culler <http://math.uic.edu/~culler>`_
* `Nathan Dunfield <http://dunfield.info>`_

with contributions from 

* `Robert Lipshitz <http://www.math.columbia.edu/~lipshitz/>`_
* Jennet Dickinson
* Malik Obeidin

Also includes third-party libraries:

* `Planarity by John Boyer <https://code.google.com/p/planarity/>`_
* `Planarmap by Giles Schaeffer
  <http://www.lix.polytechnique.fr/Labo/Gilles.Schaeffer/PagesWeb/PlanarMap/>`_

  
License
=======

Copyright 2008-present by Marc Culler, Nathan Dunfield, and others.

This code is released under the `GNU General Public License, version 2
<http://www.gnu.org/licenses/gpl-2.0.txt>`_
or (at your option) any later version as published by the Free
Software Foundation. 
