Arf invariants in low dimensions

Speaker:

Michael Klug

Affiliation:

Berkeley/MPIM

Date:

Mon, 29/03/2021 - 14:00 - 14:20

Parent event:

MPIM Topology Seminar [2]

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 [3]