3 problems

Let $F$ be a smooth $2$-knot, let $n(F)$ denote its odd Khovanov invariant, and let $\Sigma(F)$ denote the branched double-cover associated to $F$. Miller–Wong's conjecture. For ev…

Let $K\subset S^4$ be a smooth 2-knot. Removing a small neighborhood of a point of $K$ gives a smooth link cobordism from the empty link to the unknot $U$, and hence a map … For de…

Suzuki's unknotting conjecture. Let $G$ be a $2$-knot in $S^4$ with unknotted equator. Then $G$ is smoothly unknotted.