Norddeutsches Gruppentheorie-Kolloquium 2022

13-15 October 2022
Heinrich-Heine-Universität Düsseldorf

Speakers
Sebastian Bischof (Gießen)
Ilaria Castellano (Bielefeld)
María Cumplido Cabello (Seville)
Gustavo A. Fernández Alcober (Bilbao)
Oihana Garaialde Ocaña (Bilbao)
Alejandra Garrido (Madrid)
Ellen Henke (Dresden)
Steffen Kionke (Hagen)
Lucia Morotti (Düsseldorf)
Eduard Schesler (Hagen)
Patrick Serwene (Dresden)
Ilir Snopche (Rio de Janeiro)
Pablo Spiga (Milano)
Christopher Voll (Bielefeld)
Torben Wiedemann (Gießen)

After two scaled-down online editions, we are again aiming for an in-person edition of the NDGK. As a bonus, the classic Fr-Sa NDGK-format is enriched by additional Th-Fr activities, which are primarily aimed at doctoral and postdoctoral researchers and which are hosted in cooperation with the local Research Training Group GRK 2240.

Schedule

The `bonus' part of the meeting commences on Thursday, 13 October, at 2.30pm and ends on Friday, 14 October, at about 12.30pm. The `classic' part starts on Friday, 14 October, at 2.30pm and ends on Saturday, 15 October, at about 1.15pm.

The talks take place in Lecture Halls 5E and 5F as indicated below.

Thursday, 13 October 2022
14:00 – 14:30 Welcome and registration (in 25.22.00.53)
14:30 – 15:30 Steffen Kionke
  Upper bounds for the first L2-Betti number of groups
5F
- Coffee/Tea Break (in 25.22.00.53) -
16:00 – 17:00 Lucia Morotti
  Decomposition of 2-parts spin representations of symmetric groups
5F
17:15 – 18:15 Eduard Schesler
  Extending branch groups to simple groups and beyond
5F
 
Friday, 14 October 2022
09:30 – 10:30 Ilaria Castellano
  A pro-p version of Sela's accessibility
5F
- Coffee/Tea Break (in 25.22.00.53) -
11:00 – 12:30 Christopher Voll
  Subgroup growth meets combinatorial geometry
5F
- Lunch Break -
14:00 – 14:30 Welcome and registration (in 25.22.00.53)
14:30 – 15:10 Ellen Henke
  Fusion systems, localities and the classification of finite simple groups
5E
15:20 – 16:00 Alejandra Garrido
  Detecting free factors in profinite completions
5E
- Coffee/Tea Break (in 25.22.00.53) -
16:30 – 17:10 Pablo Spiga
  Normal 2-coverings of finite groups
5E
17:20 – 18:00 Patrick Serwene
  Exotic and block-exotic fusion systems
5E
- Dinner -
 
Saturday, 15 October 2022
09:00 – 09:40 Ilir Snopche
  Test elements and retracts in groups
5F
09:50 – 10:20 Torben Wiedemann
  Root graded groups
5F
10:30 – 11:00 Sebastian Bischof
  Groups of Kac-Moody type over F2
5F
- Coffee/Tea Break (in 25.22.00.53) -
11:30 – 12:10 María Cumplido Cabello
  A first algorithm to solve the word problem for 3-free Artin groups
5F
12:20 – 13:00 Oihana Garaialde Ocaña
  On the cohomology of groups
5F

Unfortunately the talk of G. A. Fernández-Alcober had to be cancelled.

Abstracts

Abstracts (pdf).

Poster

NDGK2022 poster (pdf). Download before printing.

Registration

The registration is closed!

Participants

List of participants (pdf).

Contact

The organisers can be reached by email via this NDGK2022 address.

Maps and Directions

To find your way to/on the HHU campus, you may find helpful the instructions and maps provided by the university.

Archive

The 2021 NDGK meeting and the 2020 NDGK meeting took place online. You can refer to Max Horn's list for information about previous meetings.