English

Generating Set for Nonzero Determinant Links Under Skein Relation

Geometric Topology 2019-01-08 v1

Abstract

Traditionally introduced in terms of advanced topological constructions, many link invariants may also be defined in much simpler terms given their values on a few initial links and a recursive formula on a skein triangle. Then the crucial question to ask is how many initial values are necessary to completely determine such a link invariant. We focus on a specific class of invariants known as nonzero determinant link invariants, defined only for links which do not evaluate to zero on the link determinant. We restate our objective by considering a set S\mathcal{S} of links subject to the condition that if any three nonzero determinant links belong to a skein triangle, any two of these belonging to S\mathcal{S} implies that the third also belongs to S\mathcal{S}. Then we aim to determine a minimal set of initial generators so that S\mathcal{S} is the set of all links with nonzero determinant. We show that only the unknot is required as a generator if the skein triangle is unoriented. For oriented skein triangles, we show that the unknot and Hopf link orientations form a set of generators.

Keywords

Cite

@article{arxiv.1901.01556,
  title  = {Generating Set for Nonzero Determinant Links Under Skein Relation},
  author = {Aayush Karan},
  journal= {arXiv preprint arXiv:1901.01556},
  year   = {2019}
}

Comments

8 figures, 22 pages

R2 v1 2026-06-23T07:04:08.290Z