This was part of The Geometric Realization of AATRN (Applied Algebraic Topology Research Network)

Apparent pairs and optimal cycles

Ulrich Bauer, Technical University of Munich

Wednesday, August 20, 2025



Slides
Abstract: Apparent pairs (also known as evident, shallow, close, steepness, Pareto, or minimal pairs) are a fundamental construction at the interface of persistent homology and discrete Morse theory. They play a key role in the context of algorithmic and computational topology. Besides their explicit use in efficient computation of persistent homology, I will show how they can be employed in the study of the geometry and topology of Gromov-hyperbolic spaces and their Rips complexes, and to from a bridge between Morse theoretic approaches to shape reconstruction from point clouds, specifically, relating lexicographically optimal cycles in the Delaunay filtration to Wrap complexes.