Lower semicontinuity of the homotopy type of Vietoris-Rips complexes
Lower semicontinuity of the homotopy type of Vietoris-Rips complexes
Let be a compact metric space, let , and let denote the Vietoris-Rips complex at scale .
Lower semicontinuity conjecture. The complex is homotopy equivalent to whenever is sufficiently small.
The paper explicitly labels this conjecture as false and provides a counterexample immediately afterward. Thus the proposed lower semicontinuity statement does not hold for all compact metric spaces.
Sources & referencesView supporting material
Primary source
Sunhyuk Lim, Facundo Memoli and Osman Berat Okutan, “Vietoris-Rips Persistent Homology, Injective Metric Spaces, and The Filling Radius”, arXiv:2001.07588 (2024).
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