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Tangles, relative character varieties, and holonomy perturbed traceless flat moduli spaces

Guillem Cazassus, Chris Herald and Paul Kirk

Vol. 5 (2022), No. 1, 95–121
Abstract

We prove that the restriction map from the subspace of regular points of the holonomy perturbed SU(2) traceless flat moduli space of a tangle in a 3-manifold to the traceless flat moduli space of its boundary marked surface is a Lagrangian immersion. A key ingredient in our proof is the use of composition in the Weinstein category, combined with the fact that SU(2) holonomy perturbations in a cylinder induce Hamiltonian isotopies. In addition, we show that (S2,4), the 2-sphere with four marked points, is its own traceless flat SU(2) moduli space.

Keywords
holonomy perturbation, Lagrangian immersion, Floer homology, flat moduli space, traceless character variety, quilted Floer homology
Mathematical Subject Classification
Primary: 57K18, 57K31, 57R58
Secondary: 81T13
Milestones
Received: 31 January 2021
Revised: 23 April 2021
Accepted: 3 May 2021
Published: 27 October 2022
Authors
Guillem Cazassus
Mathematical Institute, University of Oxford
Oxford
United Kingdom
Chris Herald
Department of Mathematics and Statistics
University of Nevada
Reno, NV
United States
Paul Kirk
Department of Mathematics
Indiana University
Bloomington, IN
United States