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Naturality and Mapping Class Groups in Heegaard Floer Homology

About this Title

András Juhász, Dylan P. Thurston and Ian Zemke

Publication: Memoirs of the American Mathematical Society
Publication Year: 2021; Volume 273, Number 1338
ISBNs: 978-1-4704-4972-8 (print); 978-1-4704-6805-7 (online)
DOI: https://doi.org/10.1090/memo/1338
Published electronically: November 8, 2021
Keywords: Heegaard Floer homology, 3-manifold, Heegaard diagram

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Table of Contents

Chapters

  • 1. Introduction
  • 2. Heegaard Invariants
  • 3. Examples
  • 4. Singularities of Smooth Functions
  • 5. Generic One- and Two-Parameter Families of Gradients
  • 6. Translating Bifurcations of Gradients to Heegaard Diagrams
  • 7. Simplifying Moves on Heegaard Diagrams
  • 8. Simplifying Handleswaps
  • 9. Strong Heegaard Invariants Have No Monodromy
  • 10. Heegaard Floer Homology
  • A. The 2-complex of Handleslides

Abstract

We show that all versions of Heegaard Floer homology, link Floer homology, and sutured Floer homology are natural. That is, they assign concrete groups to each based 3-manifold, based link, and balanced sutured manifold, respectively. Furthermore, we functorially assign isomorphisms to (based) diffeomorphisms, and show that this assignment is isotopy invariant.

The proof relies on finding a simple generating set for the fundamental group of the “space of Heegaard diagrams,” and then showing that Heegaard Floer homology has no monodromy around these generators. In fact, this allows us to give sufficient conditions for an arbitrary invariant of multi-pointed Heegaard diagrams to descend to a natural invariant of 3-manifolds, links, or sutured manifolds.

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