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Seminar

Online Seminar: Torsion and homotopical invariants from 4D TFTs May 07, 2020 (10:00 AM PDT - 11:00 AM PDT)
Parent Program:
Location: MSRI: Online/Virtual
Speaker(s) Mark Penney (University of Waterloo)
Description No Description
Video

Torsion And Homotopical Invariants From 4D TFTs

Abstract/Media

Zoom link.

https://msri.zoom.us/s/585445592

 

This talk will consist of two parts, both describing topological invariants arising from 4D TFTs. The first part concerns higher Dijkgraaf-Witten theory based on a finite n-group. After reviewing the construction we will look at the resulting invariants of 4-manifolds and of knotted surfaces, with a particular focus on the finite 2-group case. The second part will cover BF theory and its connection to Reidemeister torsion.

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Torsion And Homotopical Invariants From 4D TFTs

H.264 Video 24988_28340_8328_Torsion_and_Homotopical_Invariants_from_4D_TFTs.mp4