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Arf invariants in low dimensions

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Speaker: 
Michael Klug
Affiliation: 
Berkeley/MPIM
Date: 
Mon, 2021-03-29 14:00 - 14:20
Parent event: 
MPIM Topology Seminar

I will briefly discuss some work in progress regarding a relationship between several different mod 2 invariants in dimensions 2, 3, and 4. In particular, I will relate the Arf invariant of a knot, the Arf invariant of a characteristic surface, the Rochlin invariant of a homology sphere, and the Kirby-Siebenmann invariant of a 4-manifold. 


Meeting ID: 916 5855 1117
Password: as before.
Contact: Arunima Ray, Tobias Barthel
Seminar page: https://nextcloud.mpim-bonn.mpg.de/s/Tq9bsCWsAJrRiNk

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