Seminar
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Location: | MSRI: Online/Virtual |
Torsion And Homotopical Invariants From 4D TFTs
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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Notes
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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 |