Seminar
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| Location: | Evans Hall, 60 |
Keywords and Mathematics Subject Classification (MSC)
Primary Mathematics Subject Classification
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This seminar series will take place on UC Berkeley campus, in Evans Hall room 60.
Unknotting number is a fundamental measure of how complicated a knot is, measuring how far it is from the unknot via crossing changes. Unknotting number is a challenging invariant to compute; a vast array of tools have been applied to its calculation, and many conjectures have grown up around it. In this talk I will discuss three conjectures, each aimed at simplifying the task of computing unknotting numbers. I will describe how our resolution of one of these conjectures several years ago led us recently to resolve another - the (non)additivity of unknotting number under connected sum. This is joint work with Mark Brittenham.
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