Homotopy ribbon concordance, Blanchfield pairings, and twisted Alexander polynomials

Friedl, Stefan and Kitayama, Takahiro and Lewark, Lukas and Nagel, Matthias and Powell, Mark (2022) Homotopy ribbon concordance, Blanchfield pairings, and twisted Alexander polynomials. CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 74 (4). pp. 1137-1176. ISSN 0008-414X, 1496-4279

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Abstract

We establish homotopy ribbon concordance obstructions coming from the Blanchfield form and Levine-Tristram signatures. Then, as an application of twisted Alexander polynomials, we show that for every knot K with nontrivial Alexander polynomial, there exists an infinite family of knots that are all concordant to K and have the same Blanchfield form as K, such that no pair of knots in that family is homotopy ribbon concordant.

Item Type: Article
Uncontrolled Keywords: S-EQUIVALENCE; REPRESENTATIONS; COBORDISMS; HOMOLOGY; TORSION; FORMS; KNOTS; Ribbon concordance; Seifert form; Blanchfield pairing; twisted Alexander polynomial; Levine-Tristram signatures
Subjects: 500 Science > 510 Mathematics
Divisions: Mathematics > Prof. Dr. Stefan Friedl
Depositing User: Petra Gürster
Date Deposited: 09 Jan 2025 10:44
Last Modified: 09 Jan 2025 10:44
URI: https://pred.uni-regensburg.de/id/eprint/46475

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