Dualities in Persistent (Co)Homology

Vin de Silva, Dmitriy Morozov, Mikael Vejdemo-Johansson.
Inverse Problems, vol. 27, 2011.
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We consider sequences of absolute and relative homology and cohomology groups that arise naturally for a filtered cell complex. We establish algebraic relationships between their persistence modules, and show that they contain equivalent information. We explain how one can use the existing algorithm for persistent homology to process any of the four modules, and relate it to a recently introduced persistent cohomology algorithm. We present experimental evidence for the practical efficiency of the latter algorithm.
Vin de Silva, Dmitriy Morozov, and Mikael Vejdemo-Johansson. Persistent cohomology and circular coordinates. Discrete and Computational Geometry, 2010, to appear.