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arxiv: math/0409185 · v2 · submitted 2004-09-10 · 🧮 math.GT

An invariant for open virtual strings

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keywords openstringsvirtualextendedgiveninvariantalexanderdefine
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Extended Alexander groups are used to define an invariant for open virtual strings. Examples of non-commuting open strings and a ribbon-concordance obstruction are given. An example is given of a slice virtual open string that is not ribbon. Definitions are extended to open n-strings.

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