On braided, banded surfaces and ribbon obstructions
classification
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obstructionsribbonapplybraidclassconjugacyeffectiveinvariants
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We discuss how to apply work of L. Rudolph to braid conjugacy class invariants to obtain potentially effective obstructions to a slice knot being ribbon. We then apply these ideas to a family of braid conjugacy class invariants coming from Khovanov-Lee theory and explain why we do not obtain effective ribbon obstructions in this case.
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