English

Dehn surgery and non-separating two-spheres

Geometric Topology 2022-11-02 v1

Abstract

When can surgery on a null-homologous knot K in a rational homology sphere produce a non-separating sphere? We use Heegaard Floer homology to give sufficient conditions for K to be unknotted. We also discuss some applications to homology cobordism, concordance, and Mazur manifolds.

Keywords

Cite

@article{arxiv.2006.11249,
  title  = {Dehn surgery and non-separating two-spheres},
  author = {Jennifer Hom and Tye Lidman},
  journal= {arXiv preprint arXiv:2006.11249},
  year   = {2022}
}

Comments

6 pages

R2 v1 2026-06-23T16:28:15.081Z