Siegel der Universität Augsburg

Universität Augsburg
Institut für Mathematik

 Siegel der Universität Augsburg

 

Oberseminar Differentialgeometrie

 

Dr. Beomjun Sohn
Aachen University
 
spricht am
 
Montag, 10. November 2025
 
um
 
16 Uhr s.t.
 
im
 
Raum 2004 (L1)
 
über das Thema:
 

»Braid stability and the spectral distance«

Abstract:
In this talk, we consider a new stability result for the topological entropy of Hamiltonian diffeomorphisms on closed surfaces. Topological entropy is a fundamental measure of orbital complexity in dynamical systems, capturing chaotic behavior through a single non-negative value. Based on Floer-theoretic persistence, we discuss the persistence of this invariant. As a corollary, we show that if a Hamiltonian diffeomorphism has positive entropy, then any perturbation supported in a disk of sufficiently small area still has positive entropy. This talk is based on joint work with Marcelo Alves and Matthias Meiwes.

 

Hierzu ergeht herzliche Einladung.
Prof. Dr. Urs Frauenfelder
 

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


[Impressum]      [Datenschutz]      wwwadm@math.uni-augsburg.de,     Mo 11-Aug-2025 15:27:38 MESZ