Squeezed knots

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• Andrew Lobb (Durham)
• Wednesday 01 March 2023, 16:00-17:00
• MR13.

If you have a question about this talk, please contact Oscar Randal-Williams.

(Joint work with Peter Feller and Lukas Lewark). A knot is called squeezed if it is a slice of a minimal genus, oriented, connected cobordism from a positive to a negative torus knot. Many popular classes of knots are squeezed. At most six knots of ten or fewer crossings are not squeezed. The Lipshitz-Sarkar stable homotopy type for Khovanov homology provides a (surprisingly?) effective means of obstructing knots from being squeezed. I’ll explain all this and also advertize a cash prize of 271 swiss francs.

This talk is part of the Differential Geometry and Topology Seminar series.

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