# Universität AugsburgInstitut für Mathematik

Oberseminar Differentialgeometrie

Dr. Otto van Koert
(Seoul National University)

spricht am

Montag, 17. Juli 2017

um

16:00 Uhr

im

Raum 2004 (L1)

über das Thema:

## »Brieskorn manifolds in geometry and topology«

 Abstract: The goal of this talk is to give an overview of Brieskorn manifolds, and the role they played in differential topology, contact topology and Sasakian geometry. A Brieskorn manifold can be defined as the link of a singular affine variety of the form $$\{ (z_0,\ldots, z_n) \in \C^{n+1} | \sum_{i=0}^n z_i^{a_i}=0 \}$$ In the lowest dimension Brieskorn manifolds are torus links embedded in S^3. Despite their very simple nature, they have given explicit models of exotic spheres, exotic contact structures, and new Einstein metrics on spheres.

 Hierzu ergeht herzliche Einladung. Prof. Dr. Urs Frauenfelder

Kaffee, Tee und Gebäck eine halbe Stunde vor Vortragsbeginn im Raum 2006 (L1).