Prof. Dr. Moritz Weber

Dr. Tobias Mai

Research seminar Free Probability Theory

Oberseminar zur Freien Wahrscheinlichkeitstheorie

In this research seminar we treat topics ranging from free probability and random matrix theory to combinatorics, operator algebras, functional analysis and quantum groups.

Time and place

Wednesdays, 16:15-18:00, room SR 6, building E2 4
talks are 60 minutes plus discussion

Due to the current circumstances, all talks will be given online using the platform Zoom.

Talks in 2020

  • 27.05.2020,   2:15pm,    Nina Becker    (Saarland University)
    Zur Asymptotik der Maxima von Faberpolynomen bei wachsendem Grad

  • 24.06.2020,   4:15pm,    Friedrich Günther    (Saarland University)
    Easy groups as matrix groups
    Easy groups as defined by Banica and Speicher and Unitary easy groups as defined by Weber and Tarrago are special compact matrix groups that sit between Sn and On respectively Sn and Un. While recovered via abstract Tannaka Krein duality, a verification of the given groups is possible using basic representational methods and elementary matrix calculations, as will be shown in the talk.

  • 22.07.2020,   4:15pm,    Alexander Wendel    (Saarland University)
    Hochschild cohomology of free easy quantum groups
    In this talk a method for calculating the second Hochschild cohomlogy groups of quantum subgroups of the unitary quantum group due to Franz and coworkers will be presented. This method had already been used to calculate the second cohomlogy groups of some free easy quantum groups. The remaining cases as well as the general method will be presented.

  • 16.09.2020,   4:15pm,    Jonas Wahl    (Hausdorff Center for Mathematics, Bonn)
    A probabilistic approach to diagram algebras
    I will present recent results on the representation theory of infinite diagram algebras that appear in the theory of partition quantum groups. We will discuss the branching graphs of these algebras and show how traces on them can be classified by understanding them as random processes on well-studied combinatorial structures such lattice paths, trees or the Young graph.

Past talks


updated: 14 September 2020   Moritz WeberO Impressum