GAUS-AGs

Definition: A GAUS-AG is a typically semester long (bi-)weekly Arbeitsgemeinschaft with talks by typically GAUS-members aiming to learn together current developments along a coordinated programme. Talks serve multiple purposes with introductory talks laying the foundations of a theory and more advanced talks that dig into technical parts of a new result. Sometimes we invite “the” specialist for the topic of the programme to give a final talk.

We meet every Thursday at 11 p.m. (s.t.) in SR 8 (Mathematikon) in Heidelberg.

The program can be found here.

Organizers: Otmar Venjakob and Marvin Schneider

During the summer term 2025, the anabelian GAUS-AG has the title
Arithmetic representations of fundamental groups after Daniel Litt “Arithmetic representations of fundamental groups II”.

The AG will meet Thursday afternoon 14:00-18:00 approximately biweekly for 7 times alternating between Heidelberg and Frankfurt, with two talks per meeting. We start May 08, 2025, and the remaining dates can be found in the GAUS-calendar and the programme.

Organizers: Magnus Carlson and Marius Leonhardt

We meet every Tuesday 14:00 – 15:30 in S2|15 401 in Darmstadt in person and hybrid.

The program can be found here.

The organizers are: Rızacan Ciloglu, Timo Richarz and Torsten Wedhorn

The seminar will take place on Fridays, 9-11, in room SR8.

The goal of the seminar is to study the recent paper by Arai-Hattori-Kondo-Papikian.
We will have some preliminary talks on stacks and D-elliptic sheaves.

The program can be found here.

Organizers: Andrea Conti, Alireza Shavali and Sriram Chinthalagiri Venkata

We are organizing a GAUS AG on non-A^1-invariant motivic spectra à la Annala-Hoyois-Iwasa. The seminar will usually take place Mondays from 10:15-11:45 in Mainz (Hilbertraum), with some exceptions due to holidays.

The programme can be found here.

Organizers: Georg Tamme, Tom Bachmann, Klaus Mattis

We are organizing a GAUS AG on Scholze’s new preprint on Berkovich motives.

The AG will meet biweekly on Thursdays: there will be sessions of two talks alternating between Heidelberg, Darmstadt, and Frankfurt. The first session will be in Darmstadt on 24.04 at 13:00, at room 315.

The programme can be found here.

Organizers: C. Dahlhausen, A. Merici and C. Yaylali


The goal is to provide background on Gromow-Witten theory and then dive into aspects of real geometry and/or properties of the double ramification cycles. See the (quite preliminary) appended program for more details.

The AG will meet Wednesday afternoons starting at 14.15 (two talks of 60 mins per session), Frankfurt, Robert-Mayer-Str 6-8, Raum 309. We start April 30, 2025.

Organizers: Martin Möller

Past GAUS-AGs