Double slice genus
= Double slice genus
{title2=$g_{ds}(K)$}
The double slice genus is the smallest genus of an unknotted closed orientable surface in $S^4$ whose transverse equatorial cross-section is $K$.
= Double slice genus
{title2=$g_{ds}(K)$}
The double slice genus is the smallest genus of an unknotted closed orientable surface in $S^4$ whose transverse equatorial cross-section is $K$.