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 project:

    http://snappy.computop.org

For some basic examples of using Spherogram to build links, see 

    http://snappy.computop.org/spherogram.html

Developed by 

* Marc Culler,  http://math.uic.edu/~culler
* Nathan Dunfield,  http://dunfield.info

with contributions from 

* Robert Lipshitz
* Jennet Dickinson

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
========

This code is released under the GNU General Public License version 2 or (at your option) any later version as published by the Free Software Foundation.  See

     http://www.gnu.org/licenses/gpl-2.0.txt 

for the complete license text. 

