2 papers
math.GT2026
Exotic Surfaces in 4-manifolds and Surface Corks
Cindy Zhang
A fundamental result in 4-manifold topology asserts that any two exotic smooth structures on a simply-connected, closed 4-manifold differ by a cork twist: the operation of removing…
math.GT2022
Bounds for Kirby-Thompson invariants of knotted surfaces
Román Aranda, Puttipong Pongtanapaisan, Cindy Zhang
We provide sharp lower bounds for two versions of the Kirby-Thompson invariants for knotted surfaces, one of which was originally defined by Blair, Campisi, Taylor, and Tomova. The…