Odeljenje za matematiku, 2. septembar 2022.

Naredni sastanak Seminara biće održan u petak 2. septembra 2022. u sali 301f Matematičkog instituta SANU i onlajn sa početkom u 14.15 časova.

Predavač: Semra Pamuk, Middle East Technical University, Türkiye

Naslov predavanja:  ON SYMMETRIES OF FOUR MANIFOLDS

Apstrakt:
One often studies a mathematical object by studying its symmetries. For example a torus has less symmetries than a sphere. Rigorously, symmetries are expressed through group actions. In this talk, I will give some old and new information about the existence of finite group actions on closed, connected, orientable 4-manifolds. In this dimension, the comparison between smooth and topological group actions are interesting but our focus will be on locally linear topological actions. More precisely, we will try to answer the following question: Given a closed, orientable 4-manifold M, what is the maximum value of rank(G) over all finite groups G which acts effectively, locally linearly, homologically trivially on M?

This is a joint work with Ian Hambleton.

Registracija za učešće na seminaru je dostupna na sledećem linku:
https://miteam.mi.sanu.ac.rs/asset/tz97w4Hu4c3unsJ7N
Ukoliko želite samo da pratite predavanje, bez mogućnosti aktivnog učešća, prenos je dostupan na sledećem linku:
https://miteam.mi.sanu.ac.rs/asset/J6zEMJyMSoAbTMMX7



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