English

Genus bounds for twisted quantum invariants

Quantum Algebra 2022-11-29 v1 Geometric Topology

Abstract

By twisted quantum invariants we mean polynomial invariants of knots in the three-sphere endowed with a representation of the fundamental group into the automorphism group of a Hopf algebra HH. These are obtained by the Reshetikhin-Turaev construction extended to the Aut(H)\mathrm{Aut}(H)-twisted Drinfeld double of HH, provided HH is finite dimensional and Nm\mathbb{N}^m-graded. We show that the degree of these polynomials is bounded above by 2g(K)d(H)2g(K)\cdot d(H) where g(K)g(K) is the Seifert genus of a knot KK and d(H)d(H) is the top degree of the Hopf algebra. When HH is an exterior algebra, our theorem recovers Friedl and Kim's genus bounds for twisted Alexander polynomials. When HH is the Borel part of restricted quantum sl2\mathfrak{sl}_2 at an even root of unity, we show that our invariant is the ADO invariant, therefore giving new genus bounds for these invariants.

Keywords

Cite

@article{arxiv.2211.15010,
  title  = {Genus bounds for twisted quantum invariants},
  author = {Daniel López Neumann and Roland van der Veen},
  journal= {arXiv preprint arXiv:2211.15010},
  year   = {2022}
}

Comments

31 pages

R2 v1 2026-06-28T07:14:18.271Z