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Positivities of Knots and Links and the Defect of Bennequin Inequality
Journal article   Peer reviewed

Positivities of Knots and Links and the Defect of Bennequin Inequality

Jesse Hamer, Tetsuya Ito and Keiko Kawamuro
Experimental mathematics, Vol.31(1), pp.199-225
01/02/2022
DOI: 10.1080/10586458.2019.1596848
url
https://arxiv.org/pdf/1809.10836View
Open Access

Abstract

We discuss relations among various positivities of knots and links, such as strong quasipositivity and quasipositivity. We give several pieces of supporting evidence for conjectural statements concerning these positivities and the defect of Bennequin inequality. Finally, we determine strong quasipositivity and quasipositivity for knots up to 12 crossings (with two exceptions for quasipositivity).
Bennequin inequality defect homogeneous link quasipositive strongly quasipositive

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