BIRS Workshop Lecture Videos

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BIRS Workshop Lecture Videos

Unlinking information from 4-manifolds Nagel, Matthias


In the talk I will explain how to obtain lower bounds on unlinking numbers through 4-manifold techniques using a generalization of a theorem of Cochran-Lickorish. The method will be illustrated using links from Kohn's table whose unlinking numbers have only recently been determined through these methods.

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