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Cornered Heegaard Floer Homology

About this Title

Christopher L. Douglas, Mathematical Institute, University of Oxford, Oxford, OX2 6GG, UK, Robert Lipshitz, Department of Mathematics, University of North Carolina, Chapel Hill, NC 27599, USA and Ciprian Manolescu, Department of Mathematics, UCLA, 520 Portola Plaza, Los Angeles, CA 90095, USA

Publication: Memoirs of the American Mathematical Society
Publication Year: 2019; Volume 262, Number 1266
ISBNs: 978-1-4704-3771-8 (print); 978-1-4704-5505-7 (online)
DOI: https://doi.org/10.1090/memo/1266
Published electronically: December 23, 2019
MSC: Primary 57R56, 57R58

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Table of Contents

Chapters

  • 1. Introduction
  • 2. Some abstract 2-algebra
  • 3. More 2-algebra: Bending and smoothing
  • 4. Some homological algebra of 2-modules
  • 5. The algebras and algebra-modules
  • 6. The cornering module–2-modules
  • 7. The trimodules $\mathsf {T}_{DDD}$ and $\mathsf {T}_{DDA}$
  • 8. Cornered 2-modules for cornered Heegaard diagrams
  • 9. Gradings
  • 10. Practical computations
  • 11. The nilCoxeter planar algebra

Abstract

Bordered Floer homology assigns invariants to 3-manifolds with boundary, such that the Heegaard Floer homology of a closed 3-manifold, split into two pieces, can be recovered as a tensor product of the bordered invariants of the pieces. We construct cornered Floer homology invariants of 3-manifolds with codimension-2 corners, and prove that the bordered Floer homology of a 3-manifold with boundary, split into two pieces with corners, can be recovered as a tensor product of the cornered invariants of the pieces.

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