Siegel der Universität Augsburg

Universität Augsburg
Institut für Mathematik

Siegel der Universität Augsburg


Augsburger Mathematisches Kolloquium


Professor Dr. Sebastian Hensel
Ludwig-Maximilians-Universität München

spricht am
Dienstag, 10. Dezember 2019
17:30 Uhr
Raum 2004 (L1)
über das Thema:

»Symmetries of surfaces and curve graphs«

Surfaces are amongst the most ubiquitous objects in geometry and topology. While they are very basic topological spaces, their symmetry groups are surprisingly rich and still produce a wealth of interesting questions. In recent years, negatively curved geometry has turned out to be a particularly successful tool in the study of mapping class groups. This is facilitated by the so-called curve graph, which encodes intersection patterns between simple closed curves on surfaces. In this talk we will explore these connections, starting with very classical and explicit examples, and ending with a very recent result (joint with Jonathan Bowden and Richard Webb) which answers a question of Burago-Ivanov-Polterovich on isotopically trivial surface homeomorphisms.


Hierzu ergeht herzliche Einladung.
Prof. Dr. Bernhard Hanke

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

[Impressum]      [Datenschutz],     Mo 28-Okt-2019 15:01:52 MEZ