On the unknotting number of minimal diagrams

Stoimenow, A.

doi:10.1090/S0025-5718-03-01514-X

On the unknotting number of minimal diagrams
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Math. Comp. 72 (2003), 2043-2057 Request permission

Abstract:

Answering negatively a question of Bleiler, we give examples of knots where the difference between minimal and maximal unknotting number of minimal crossing number diagrams grows beyond any extent.

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