Darstellungstheorietage 2025

GRK 2240:
Algebro-geometric Methods in Algebra, Arithmetic and Topology

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.

Schedule

The event starts on Thursday, 13 November, at 2pm and ends on Friday, 14 November, around 1.15pm; see below for a detailed schedule.
Traditionally, a joint dinner takes place on Thursday evening. We reserved tables in Cafe Weise an der Uni, a pub style restaurant at the northern end of the campus and about 20 min walking distance from the Mathematical Institute. They offer a range of drinks and foods, including some vegetarian options. Due to the large number of participants we reserved additional tables at Sen Vegan Cuisine, nearby. The problem of splitting into two groups of suitable size will be resolved on the day.

The programme is as follows. We will be within the joint building complex 25.22 and 25.11 at the southern end of the campus. Registration and the coffee/tea breaks will be in Room 25.22.00.53. The talks take place in lecture hall 5C on Thursday and in lecture hall 5E on Friday.

Day 1 - Thursday 13 Nov 2025

Day 2 - Friday 14 Nov 2025

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

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.

The precise venue will be announced in due time.

The campus is reachable by tram or bus:

• Trams U73 and U79: Get off at "Universität Ost/Botanischer Garten"
• Trams 704 and U72: Get off at "Universität Nord/Christophstr." and either walk approximatively 15 minutes down Christophstr. or take the U73.
• Bus M3, SB53, SB57, 731, 735, 827, 835 and 836: Get off at "Uni Mitte".

Registration & Accommodation

In order to attend, please send an email to the organisers providing your name and affiliation (e.g. the name of your university). Please confirm that you are happy for us to include the information submitted (name, affiliation) to create a public list of participants on this webpage. Finally, please indicate whether you are likely to attend the dinner on Thursday evening and, if so, whether you will require vegan food options. Due to the high number of participants we cannot guarantee that last-minute registrations for the dinner can be accommodated for.

The remaining supply of rooms at HK-Hotel Düsseldorf City that we had initially blocked had to be released. You are repsonsible for your hotel booking.

Organisers & Contact

The meeting is organised by Clotilde Gauthier and Benjamin Klopsch.

Please use the dedicated email address to contact us about matters concerning the meeting.

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.