Barcodes and area-preserving homeomorphisms

Abstract

In this paper we use the theory of barcodes as a new tool for studying dynamics of area-preserving homeomorphisms. We will show that the barcode of a Hamiltonian diffeomorphism of a surface depends continuously on the diffeomorphism, and furthermore define barcodes for Hamiltonian homeomorphisms. Our main dynamical application concerns the notion of {\it weak conjugacy}, an equivalence relation which arises naturally in connection to $C^0$ continuous conjugacy invariants of Hamiltonian homeomorphisms. We show that for a large class of Hamiltonian homeomorphisms with a finite number of fixed points, the number of fixed points, counted with multiplicity, is a weak conjugacy invariant. The proof relies, in addition to the theory of barcodes, on techniques from surface dynamics such as Le Calvez's theory of transverse foliations. In our exposition of barcodes and persistence modules, we present a proof of the Isometry Theorem which incorporates Barannikov's theory of simple Morse complexes.

arXiv comment109 pages, 18 figures

References in corpus (6)

• Persistent homology and Floer-Novikov theory
• The action spectrum and C^0 symplectic topology
• Action and Index Spectra and Periodic Orbits in Hamiltonian Dynamics
• C^0-limits of Hamiltonian paths and the Oh-Schwarz spectral invariants
• Rigidity of mapping class group actions on $S^1$
• Spectral killers and Poisson bracket invariants

Cited by in corpus (7)

• Bounds on spectral norms and barcodes
• The action spectrum and C^0 symplectic topology
• Proof of the simplicity conjecture
• Quantitative Heegaard Floer cohomology and the Calabi invariant
• Bar codes of persistent cohomology and Arrhenius law for p-forms
• Topological Persistence in Geometry and Analysis
• Barcodes as Summary of Loss Function Topology