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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48.

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Universality of the homotopy interleaving distance
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by Andrew J. Blumberg and Michael Lesnick
Trans. Amer. Math. Soc. 376 (2023), 8269-8307
DOI: https://doi.org/10.1090/tran/8738
Published electronically: September 14, 2023

Abstract:

As a step towards establishing homotopy-theoretic foundations for topological data analysis (TDA), we introduce and study homotopy interleavings between filtered topological spaces. These are homotopy-invariant analogues of interleavings, objects commonly used in TDA to articulate stability and inference theorems. Intuitively, whereas a strict interleaving between filtered spaces $X$ and $Y$ certifies that $X$ and $Y$ are approximately isomorphic, a homotopy interleaving between $X$ and $Y$ certifies that $X$ and $Y$ are approximately weakly equivalent.

The main results of this paper are that homotopy interleavings induce an extended pseudometric $d_{HI}$ on filtered spaces, and that this is the universal pseudometric satisfying natural stability and homotopy invariance axioms. To motivate these axioms, we also observe that $d_{HI}$ (or more generally, any pseudometric satisfying these two axioms and an additional “homology bounding” axiom) can be used to formulate lifts of several fundamental TDA theorems from the algebraic (homological) level to the level of filtered spaces.

Finally, we consider the problem of establishing a persistent Whitehead theorem in terms of homotopy interleavings. We provide a counterexample to a naive formulation of the result.

References
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Bibliographic Information
  • Andrew J. Blumberg
  • Affiliation: Irving Institute for Cancer Dynamics, Columbia University
  • MR Author ID: 648837
  • Email: andrew.blumberg@columbia.edu
  • Michael Lesnick
  • Affiliation: Department of Mathematics and Statistics, University at Albany – SUNY
  • MR Author ID: 1104523
  • Email: mlesnick@albany.edu
  • Received by editor(s): June 5, 2017
  • Received by editor(s) in revised form: March 4, 2022, and April 26, 2022
  • Published electronically: September 14, 2023
  • Additional Notes: The second author was partially supported by NSF grant DMS-1128155, NIH grants U54-CA193313-01 and T32MH065214, funding from the IMA, and an award from the J. Insley Blair Pyne Fund. The first author was partially supported by NIH grant 5U54CA193313 and AFOSR grant FA9550-15-1-0302.
  • © Copyright 2023 by the authors
  • Journal: Trans. Amer. Math. Soc. 376 (2023), 8269-8307
  • MSC (2020): Primary 55P99; Secondary 55U99
  • DOI: https://doi.org/10.1090/tran/8738