Welcome to Dionysus’ documentation!


Dionysus 2 is now available.

Dionysus is a C++ library for computing persistent homology. It provides implementations of the following algorithms:


Document more examples.


A Practical Guide to Persistent Homology (Dionysus edition) and accomapnying examples may be a good place to get familiar with the library.

The C++ API is currently very poorly documented. One’s best source for its documentation is its usage in various Examples (located in examples/).

The Python bindings provide both a simple interface to the low-level C++ functionality as well as high-level auxilliary routines. Their “thinness” is meant to provide the efficiency benefits of C++ together with the simplicity, elegance, and interactivity of Python. Since they mimick the C++ functionality, their documentation may be a helpful resource for the latter.

Download the software, or read a Brief Tutorial to get acquainted with its structure.

The library is distributed under the GPL license.