Events

Hermitian K-theory is the study of unimodular forms through the eyes of K-theory. In work of B. Calmès, E. Dotto, Y. Harpaz, F. Hebestreit, M. Land, K. Moi, D. Nardin, T. Nikolaus and W. Steimle, it was recently shown that there is a fibre sequence relating ordinary algebraic K-theory, hermitian K-theory (aka Grothendieck-Witt theory) and L-theory in a very general context. The online lectures of Markus Land (Copenhagen) and Yonatan Harpaz (Paris 13) will focus on these results.

The world - especially the world of mathematics - is full of mysteries. Particularly interesting and exciting are those that yield unexpected results that run counter to our intuition. Such thought experiments are the subject of the lecture "Paradoxe Phänomene in der Mathematik" which will be held online on 29 September 2020, 7:30 pm, in German. The Cluster of Excellence Mathematics Münster invites everyone who is interested.

Prof. Dr. Urs Hartl and Prof. Dr. Martin Hils organize the "Bridging the Gap" seminar "O-Minimality and the André-Oort Conjecture" which connects Model Theory and Arithmetic Algebraic Geometry. It will be held on Tuesdays, 2-4 pm. PhD students and master's students may enroll. The seminar will start in the first week of November, and the first organisation meeting will be on 6 October 2020, 2:15 pm, via Zoom. HIS-LSF

This is a focus programme on operator algebras and their interplay with group actions. In this context we will be interested in amenable structures and their many incarnations, and in rigidity phenomena which typically arise as soon as one leaves the amenable setup.