Concordance invariants from $U(1)\times U(1)$-equivariant Khovanov homology

Rostislav Akhmechet, Melissa Zhang

We study Khovanov homology over the Frobenius algebra $\mathbb{F}[U,V,X]/((X-U)(X-V))$, or $U(1)\times U(1)$-equivariant Khovanov homology, and extract two families of concordance…