Topologically embedding spheres in knot traces
Patrick Orson (Boston College)
Abstract: Knot traces are smooth 4-manifolds with boundary, that are homotopic to the 2-sphere, and obtained by attaching a 2-handle to the 4-ball along a framed knot in the 3-sphere. I will give a complete characterisation for when the generator of the second homotopy group of a knot trace can be represented by a locally flat embedded 2-sphere with abelian exterior fundamental group. The answer is in terms of classical and computable invariants of the knot. This is a joint project with Feller, Miller, Nagel, Powell, and Ray.
algebraic geometryanalysis of PDEsalgebraic topologycomplex variablesdifferential geometrygeneral topologygeometric topologyK-theory and homologymetric geometryrepresentation theorysymplectic geometry
Audience: researchers in the topic
CRM - Séminaire du CIRGET / Géométrie et Topologie
Series comments: Hybrid seminar of geometry and topology. Laboratory : CIRGET - www.cirget.uqam.ca The homepage of the seminar is www.cirget.uqam.ca/fr/seminaires.html
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The livestream is on Zoom at : uqam.zoom.us/j/98999725241 (no password is needed).
The recorded talks can be found at CIRGET channel : www.youtube.com/channel/UCLkFm-uEvXSf9y-iQtWOLWA
Organizers: | Julien Keller*, Duncan McCoy |
*contact for this listing |