Year: 2024
Type: article
Abstract: We associate several invariants to a knot in an integer homology 3-sphere using SU.2/ singular instanton gauge theory.There is a space of framed singular connections for such a knot, equipped with a circle action and an equivariant Chern-Simons functional, and our constructions are morally derived from the associated equivariant Morse chain complexes.In particular, we construct a triad of groups analogous to the knot Floer homology package in Heegaard Floer homology, several Frøyshov-type invariants which are concordance invariants, and more.The behavior of our constructions under connected sums are determined.We recover most of Kronheimer and Mrowka's singular instanton homology constructions from our invariants.Finally, the ADHM description of the moduli space of instantons on the 4-sphere can be used to give a concrete characterization of the moduli spaces involved in the invariants of spherical knots, and we demonstrate this point in several examples.
Source: Geometry & Topology
Authors: Aliakbar Daemi, Christopher Scaduto
Institutions: Washington University in St. Louis, University of Miami
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4405909759