Groups in Galway 2023

18–19 May 2023

University of Galway IMS

Groups in Galway 2023 will take place at the University of Galway, Ireland, from 18–19 May 2023. Everyone is invited to attend!

This meeting is generously supported by:

Invited speakers

Click here for the list of abstracts.


All talks will take place in the seminar room AC201 on the Concourse of the Arts/Science building.

Thursday, 18 May
09.15 – 09.30 Informal registration/opening
09.30 – 10.20 Tobias Rossmann Orbits of unipotent groups: tame vs wild
10.20 – 11.00 Coffee/tea
11.00 – 11.50 Colva Roney-Dougal Base size and relational complexity
12.00 – 12.50 Padraig Ó Catháin Monomial actions, group cohomology and complex Hadamard matrices
13.00 – 14.30 Lunch
14.30 – 15.20 Leo Margolis Modular Isomorphism Problem - progress, solution and open challenges
15.20 – 16.00 Coffee/tea
16.00 – 16.50 Ilaria Castellano Coxeter groups with more than two ends and groups acting on buildings
17.00 – 17.50 Gerald Williams Generalized polygons and star graphs of cyclic presentations of groups
19.00 Conference dinner Venue: McSwiggan's (3 Eyre St, Woodquay Market)
Friday, 19 May
09.45 – 10.35 Yuri Santos Rego Navigating the galaxy of Coxeter groups
10.35 – 11.10 Coffee/tea
11.10 – 12.00 Naomi Andrew Automorphisms of groups and actions on trees
12.10 – 13.00 Javier Aramayona Asymptotically rigid mapping class groups

Registration and participants

There is no registration fee, but to help us plan the meeting, we ask all participants to please register using this link.

A list of registered participants can be found here.

Conference dinner

The conference dinner will take place on Thursday 18 May. If you wish to attend the conference dinner, please register during the conference. At that point, please also inform us of dietary requirements that you may have.

The dinner is included for speakers. Regular participants are asked to pay €35 (cash only) before the lunch break on Thursday; postgraduate students will be asked to pay a reduced amount. Please note that all participants will need to pay for their drinks.


Galway can be reached by public transportation from Dublin, Shannon, and Knock airports. Visitors from continental Europe are likely to find Dublin airport the most convenient choice.

There are frequent direct buses between Dublin airport and Galway city operated by Citylink and GoBus; the journey takes about three hours. Bus Éireann operates buses from Dublin, Shannon, and Knock airports to Galway.

You can also take a train from Dublin city.

It takes about 15–20 minutes to walk from the Coach Station or Railway Station to the University of Galway campus.


There are numerous hotels and guest houses located in Galway city; these can be easily found via the usual websites. Alternatively, you can book on-campus accommodation.

We recommend that you book early.

Organisers: Angela Carnevale and Götz Pfeiffer.

last modified: 12 May 2023