Concordance invariants and the Turaev genus
Geometric Topology
2021-02-22 v2
Abstract
We show that the differences between various concordance invariants of knots, including Rasmussen's -invariant and its generalizations -invariants, give lower bounds to the Turaev genus of knots. Using the fact that our bounds are nontrivial for some quasi-alternating knots, we show the additivity of Turaev genus for a certain class of knots. This leads us to the first example of an infinite family of quasi-alternating knots with Turaev genus exactly for any fixed positive integer , solving a question of Champanerkar-Kofman.
Keywords
Cite
@article{arxiv.2010.00031,
title = {Concordance invariants and the Turaev genus},
author = {Hongtaek Jung and Sungkyung Kang and Seungwon Kim},
journal= {arXiv preprint arXiv:2010.00031},
year = {2021}
}
Comments
6 pages, 3 figures. Some references are added or corrected. More descriptions on oriented band surgeries and slice-torus invariants are added