More concordance homomorphisms from knot Floer homology

Irving Dai, Jennifer Hom, Matthew Stoffregen, Linh Truong

Published 2019-02-09Version 1

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.