A lower bound on unknotting number

DOI10.1007/s11401-004-0390-zzbMath1101.57002OpenAlexW2009442374MaRDI QIDQ2432008

Ruifeng Qiu, Jiming Ma

Publication date: 24 October 2006

Published in: Chinese Annals of Mathematics. Series B (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s11401-004-0390-z

zbMATH Keywords

knotcommutator subgroupWirtinger presentation

Mathematics Subject Classification ID

Fundamental group, presentations, free differential calculus (57M05)

Related Items (4)

The Ma–Qiu index and the Nakanishi index for a fibered knot are equal, and ω-solvability ⋮ Unknotting numbers of 2‐spheres in the 4‐sphere ⋮ An integral invariant from the knot group ⋮ The unknotting number and classical invariants. I

Cites Work

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