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math.GT2019
Gaps between consecutive untwisting numbers
Duncan McCoy
For one can define a generalization of the unknotting number called the th untwisting number which counts the number of null-homologous twists on at most s…
math.GT2019
Null-homologous twisting and the algebraic genus
Duncan McCoy
The algebraic genus of a knot is an invariant that arises when one considers upper bounds for the topological slice genus coming from Freedman's theorem that Alexander polynomial o…