English

On 2-bridge knots with differing smooth and topological slice genera

Geometric Topology 2016-11-10 v2

Abstract

We give infinitely many examples of 2-bridge knots for which the topological and smooth slice genera differ. The smallest of these is the 12-crossing knot 12a25512a255. These also provide the first known examples of alternating knots for which the smooth and topological genera differ.

Keywords

Cite

@article{arxiv.1508.01431,
  title  = {On 2-bridge knots with differing smooth and topological slice genera},
  author = {Peter Feller and Duncan McCoy},
  journal= {arXiv preprint arXiv:1508.01431},
  year   = {2016}
}

Comments

7 pages, 4 figures. Minor changes, including an updated title. Accepted for publication by Proceedings of the AMS

R2 v1 2026-06-22T10:27:56.149Z