# More concordance homomorphisms from knot Floer homology

**Authors:** Irving Dai, Jennifer Hom, Matthew Stoffregen, Linh Truong

arXiv: 1902.03333 · 2022-01-14

## TL;DR

This paper introduces a new infinite family of smooth concordance homomorphisms derived from knot Floer homology, which are explicitly computable and have applications in knot concordance and related invariants.

## Contribution

It defines an infinite family of linearly independent, integer-valued concordance homomorphisms based on local equivalence classes of knot Floer complexes.

## Key findings

- The homomorphisms are explicitly computable.
- They provide new insights into topologically slice knots.
- Applications include bounds on concordance genus and unknotting number.

## Abstract

We define an infinite family of linearly independent, integer-valued smooth concordance homomorphisms. Our homomorphisms are explicitly computable and rely on local equivalence classes of knot Floer complexes over the ring $\mathbb{F}[U, V]/(UV=0)$. We compare our invariants to other concordance homomorphisms coming from knot Floer homology, and discuss applications to topologically slice knots, concordance genus, and concordance unknotting number.

## Full text

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## Figures

6 figures with captions in the complete paper: https://tomesphere.com/paper/1902.03333/full.md

## References

28 references — full list in the complete paper: https://tomesphere.com/paper/1902.03333/full.md

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Source: https://tomesphere.com/paper/1902.03333