Colloquium SS 2025
Speaker: Ricardo Correa da Silva, Friedrich-Alexander-Universität Erlangen-Nürnberg – Invited by G. Lechner
Speaker: Joachim Cuntz, Universität Münster – Invited by K. Li
Abstract: In algebraic topology one can distinguish topological spaces by their homology or cohomology invariants. A compact or locally compact space X is completely described by the algebra of continuous complex-valued functions on X. This algebra is a commutative C*-algebra. C*-algebras are charcterized by the fact that they can be isomorphically represented by bounded operators on Hilbert space. Now, K-theory is a very powerful cohomology theory that can be extended from commutative C*-algebras (locally compact spaces) to arbitrary C*-algebras. In fact in this setting K-theory even becomes more natural and one gains access to a whole new array of techniques and applications. In this talk we will try to explain some of the new methods and applications.
Speaker: Tomoyuki Arakawa, Kyoto University – Invited by P. Fiebig and T. Creutzig
Speaker: Martin Wendler, Otto-von-Guericke-Universität Magdeburg – Invited by M.-C. Düker
Speaker: Volker Schomerus, Universität Hamburg – Invited by T. Creutzig
Speaker: Magdalena Elena Musat, University of Copenhagen – Invited by K. Li
Speaker: Albrecht Kliem, Wirsberg-Gymnasium Würzburg – Invited by E. Wiedemann
Abstract: Mathematik lebt von der Faszination, die von interessanten Problemen ausgeht. Gerade in der Schulzeit können gehaltvolle Mathematikaufgaben die Begeisterung von Jugendlichen wecken. Im Vortrag wird dies an unterschiedlichsten Aufgaben von Mathematikwettbewerben deutlich.
Die Beispiele stammen aus 30 Jahren Erfahrung in der Arbeit mit begabten Schülerinnen und Schülern und zeigen die Wirkmächtigkeit gut gestellter Herausforderungen.
Speaker: Peter Bastian, Universität Heidelberg – Invited by N. Neuß