SnapPy is a program for studying the topology and geometry of 3-manifolds, with a focus on hyperbolic structures. It runs on Mac OS X, Linux, and Windows, and combines a link editor and 3D-graphics for Dirichlet domains and cusp neighborhoods with a powerful command-line interface based on the Python programming language. You can see it in action, learn how to install it, and watch the tutorial.
Written by Marc Culler and Nathan Dunfield with additions from Matthias Goerner and data from Morwen Thistlethwaite. Uses the SnapPea kernel written by Jeff Weeks, and includes Twister by Mark Bell, Tracy Hall and Saul Schleimer.
Released under the terms of the GNU General Public License. Please cite as:
M. Culler, N. M. Dunfield, and J. R. Weeks. SnapPy, a computer program for studying the geometry and topology of 3-manifolds, http://snappy.computop.org
The development of SnapPy was partially supported by grants from the National Science Foundation, including DMS-0906155 and DMS-0707136. Any opinions, findings, and conclusions or recommendations expressed on this site are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.