2 papers
math.GT2025
Light bulb smoothing for topological surfaces in 4-manifolds
Jae Choon Cha, Byeorhi Kim
We present new smoothing techniques for topologically embedded surfaces in smooth 4-manifolds, which give topological isotopy to a smooth surface. As applications, we prove "topolo…
math.GT2025
Iterated satellite operators on the knot concordance group
Jae Choon Cha, Taehee Kim
We show that for a winding number zero satellite operator on the knot concordance group, if the axis of has nontrivial self-pairing under the Blanchfield form of the patter…