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Abstract
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We study a notion of distance between knots, defined in terms of the number of saddles in
ribbon concordances connecting the knots. We construct a lower bound on this distance using
the
–action
on Lee’s perturbation of Khovanov homology.
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Keywords
Khovanov homology, ribbon concordance
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Mathematical Subject Classification 2010
Primary: 57M25
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Publication
Received: 4 June 2019
Revised: 25 July 2019
Accepted: 5 August 2019
Published: 23 April 2020
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