Proof of concept code for computing Betti diagrams relative to lower hook modules. This code accompanies the paper "Koszul complexes and relative homological algebra of functors over posets" by Wojciech Chachólski, Andrea Guidolin, Isaac Ren, Martina Scolamiero, and Francesca Tombari.
This software is released under GPLv3, or (at your option) any later version as published by the Free Software Foundation.
This code computes the Betti diagrams of a multiparameter persistence module,
given a free presentation. Extra visualization is provided for the 2D case.
All of the code is in lowerhooks.py: run
python lowerhooks.py --random --draw
to generate a random free 2D presentation and draw it. Run
python lowerhooks.py --input=example.txt --draw
to view the presentation of an example free presentation. Run
python lowerhooks.py -h to see all other options.