Journal
FOUNDATIONS OF COMPUTATIONAL MATHEMATICS
Volume 15, Issue 6, Pages 1501-1531Publisher
SPRINGER
DOI: 10.1007/s10208-014-9229-5
Keywords
Persistent topology; Interleaving; Stability; Sublinear projections; Superlinear families; Inverse-image persistence
Funding
- AFOSR [FA9550-13-1-0115]
- Simons Foundation [267571]
- National Science Foundation
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We consider the question of defining interleaving metrics on generalized persistence modules over arbitrary preordered sets. Our constructions are functorial, which implies a form of stability for these metrics. We describe a large class of examples, inverse-image persistence modules, which occur whenever a topological space is mapped to a metric space. Several standard theories of persistence and their stability can be described in this framework. This includes the classical case of sublevelset persistent homology. We introduce a distinction between 'soft' and 'hard' stability theorems. While our treatment is direct and elementary, the approach can be explained abstractly in terms of monoidal functors.
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