Darstellungstheorietage 2025
GRK 2240:
Algebro-geometric Methods in Algebra, Arithmetic and Topology
University of Düsseldorf, 13-14 November 2025
Speakers & Talks
- Ramla Abdellatif (Université de Picardie Jules Verne): "An introduction to p-modular representations of p-adic groups"
and "p-modular Iwahori-Hecke algebras and their simple modules for the p-adic metaplectic SL(2)"
- Erik Barinaga (Bergische Universität Wuppertal): "Chow groups of Deligne-Lusztig varieties"
- Charles Eaton (University of Manchester): "A survey of progress on Donovan's conjecture"
- Eugenio Giannelli (Università degli Studi di Firenze): "McKay bijections and character degrees"
- Tommaso Scognamiglio (INdAM, Università di Bologna): "Multiplicities for finite reductive groups and character varieties for Riemann surfaces"
- Britta Späth (Bergische Universität Wuppertal): "Towards the Alperin-McKay Conjecture"
- Pavel Turek (University of Birmingham): "Decomposition columns labelled by d-balanced partitions"
- Ziqian Yin (Bergische Universität Wuppertal): "Mod p local Langlands correspondence"
You can find the abstracts here and also slides for some of the talks: (i)
slides for Abdellatif's first talk, (ii) sildes for Eaton's talk, (iii) slides for Turek's talk.
Photos
Below is the conference picture. You can also browse through a small collection of additional photos from the meeting.
Schedule
The programme was as follows.
Day 1 - Thursday 13 Nov 2025
13:00 - 14.05 Registration, coffee/tea (Bldg 25.22, Rm 00.53)
14:10 - 14.15 Welcome and practical matters (Bldg 25.11, LH 5C)
14:15 - 15:05 R. Abdellatif: An introduction to p-modular representations of p-adic groups
15:10 - 15:40 Coffee/tea break
15:40 - 16:20 R. Abdellatif: p-modular Iwahori-Hecke algebras and their simple modules for the p-adic metapectic SL(2)
16:30 - 17:00 E. Barinaga: Chow groups of Deligne-Lusztig varieties
17:10 - 18:00 C. Eaton: A survey of progress on Donovan's conjecture
19:30 Drinks/Joint Dinner (optional)
Day 2 - Friday 14 Nov 2025
08:30 - 08.55 Coffee/tea
09:00 - 09.50 E. Giannelli: McKay bijections and character degrees
10.00 - 10.30 P. Turek: Decomposition columns labelled by d-balanced partitions
10:30 - 11:00 Coffee/tea break
11:00 - 11:30 T. Scongnamiglio: Multiplicities for finite reductive groups and character varieties for Riemann surfaces
11:35 - 12:05 Z. Yin: Mod p local Langlands correspondence
12:05 - 12:25 Coffee/tea
12:30 - 13:10 B. Späth: Towards the Alperin-McKay Conjecture
Participants
- Ramla Abdellatif (UPJV Amiens)
- Erik Barinaga (BUW, Wuppertal)
- Adrian Baumann (HHU Düsseldorf)
- Andreas Bode (BUW, Wuppertal, and HHU Düsseldorf)
- Bernhard Böhmler (LUH, Hannover)
- Thomas Breuer (RWTH Aachen)
- Inna Capdeboscq (University of Warwick)
- Haiyu Chen (CUHK, Hong Kong)
- Nicolas Dupré (BUW, Wuppertal)
- Charles Eaton (University of Manchester)
- Daniel Echtler (HHU Düsseldorf)
- Vincent Gajda (BUW, Wuppertal)
- Clotilde Gauthier (HHU Düsseldorf)
- Max Gheorghiu (HHU Düsseldorf)
- Eugenio Giannelli (UNIFI, Firenze)
- Doris Grothusmann (HHU Düsseldorf)
- Frank Himstedt (TU München)
- Gerhard Hiß (RWTH Aachen)
- Holger Kammeyer (HHU Düsseldorf)
- Steffen Kionke (FernUniversität in Hagen)
- Benjamin Klopsch (HHU Düsseldorf)
- Burkhard Külshammer (FSU Jena)
- Flor De May C. Lañohan (MSU IIT, Philippines and UPJV Amiens)
- Caroline Lassueur (LUH, Hannover)
- Frank Lübeck (RWTH Aachen)
- Gunter Malle (RPTU Kaiserslautern)
- Gaëtan Mancini (BUW, Wuppertal)
- Charlie Mathieu (UPJV Amiens)
- Niccolò Mecacci (BUW, Wuppertal)
- Alena Ramona Meyer (HHU Düsseldorf)
- Nowras N. A. M. Otmen (UNIPD, Padova)
- Christiane Ott (TU München)
- Sonia Petschick (BUW, Wuppertal)
- Margherita Piccolo (Fernuniversität Hagen)
- Julian Reichardt (BUW, Wuppertal)
- Tomas Reunbrouck (U Bielefeld)
- Lean Rohlfs (MLU Halle-Wittenberg)
- Fabian Rodatz (HHU Düsseldorf)
- Lorenzo Schena (RWTH Aachen)
- Tobias Schmidt (BUW, Wuppertal)
- Alec Schmutz (U Bielefeld)
- Tommaso Scognamiglio (INdAM, Unibo, Bologna)
- Jianhao Shen (U Bielefeld)
- Britta Späth (BUW, Wuppertal)
- Pavel Turek (University of Birmingham)
- Ziqian Yin (BUW, Wuppertal)
- Marcus Zibrowius (HHU Düsseldorf)
Location & Transportation
The meeting took place at the
Mathematical Institute
Heinrich Heine University
Universitätsstr. 1
40225 Düsseldorf
You may find it helpful to refer to the campus map or the webpage of the Mathematical Institute for further information.
Registration & Accommodation
The event took place in November 2025.
Organisers & Contact
The meeting is organised by Clotilde Gauthier and Benjamin Klopsch.
Previous Editions & Funding Acknowledgements
The previous two editions of the Darstellungstheorietage took place in Stuttgart (2024+ε) and Wuppertal (2023+ε).
We kindly acknowledge partial funding for the event by the Mathematical Institute and by the DFG-funded RTG 2240.
