DAMUT

our colloquium is a Hybrid event!

Our mathematics department organizes the DAMUT Hybrid colloquium from 12:45 to 13:15 in RA 1501/MS-Teams

Organizers: Alexander Skopalik, Christoph Brune, and Matthias Schlottbom

The colloquia will be partially used to give the floor to several freshly appointed staff members, and partially for internationally well-known speakers. The colloquium will last only 30 minutes (25 minutes of presentation and 5 minutes of discussion).

We will do this on Wednesday, as usual during the lunch break. We hope that all of us will be able to make it.

Alexander, Christoph, and Matthias.

Upcoming dates:

04 March 2026 Speaker: Martijn Gösgens (MDS/MOR-SOR) in Room RA2501

Date: 04 March 2026 in Room RA-2501

Speaker: Dr. Martijn Gösgens (MDS/MOR-SOR)

Title: Geometry hinders the formation of consensus in asynchronous majority dynamics

Abstract: We investigate a model of opinion dynamics where vertices asynchronously announce opinions based on their private opinion and on the previously announced opinions of their neighbors. Our focus is on understanding how the structure of the underlying graph influences the likelihood of reaching consensus on the true opinion. Previous work proved that for sufficiently sparse, connected expander graphs, this process terminates in consensus on the true opinion with high probability. In this work, we show that when the underlying graph has geometric structure, the process is likely to terminate in disconsensus. Specifically, we prove that for a one-dimensional Random Geometric Graph (RGG) of n vertices with expected degree o(√n), the process ends in disconsensus with high probability. Numerical experiments indicate that this phenomenon persists in higher-dimensional RGGs. Instead of a global consensus, we observe that the geometry leads to local consensuses.

01 April 2026: Speaker t.b.a. meeting is in room RA-1501

Date: 01 April 2026

Speaker: t.b.a.

Title: "t.b.a."

06 May 2026: Speaker: Gregor Gantner (MAGNUS-MACS)

Date: 06 May 2026

Speaker: Gregor Gantner (MAGNUS-MACS)

Title: "t.b.a."

Here you can find our archive of lunch bag colloquia