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Interleaving

  • INRIA
  • Pomona College

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

This chapter examines the interleaving relation between persistence modules, and the associated interleaving metric. Interleavings are approximate isomorphisms, and in the first instance may be defined by a pair of ‘shifted’ homomorphisms between the two persistence modules being compared. More abstractly, an interleaving can be thought of as a solution to a functor extension problem. The Interpolation Lemma is the main result of this chapter: it asserts that a pair of interleaved persistence modules can be interpolated by a 1-Lipschitz 1-parameter family. We give three different explicit constructions of the interpolation; two of them are the left and right Kan extensions (in the functor extension point of view), while the third mediates between the two.

Original languageEnglish
Title of host publicationSpringerBriefs in Mathematics
PublisherSpringer Science and Business Media B.V.
Pages67-80
Number of pages14
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Publication series

NameSpringerBriefs in Mathematics
ISSN (Print)2191-8198
ISSN (Electronic)2191-8201

Keywords

  • Functor Extension
  • Homology Module
  • Interpolation Parameter
  • Persistence Diagram
  • Persistent Homology

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