Two-Day Geometry Meeting

22 May 2023, 1.00 PM - 23 May 2023, 1.30 PM

Room 2.04, School of Mathematics, Fry Building, Woodland Road, Bristol, BS8 1UG

This Two-Day Geometry Meeting taking place over the afternoon of Monday 22nd May and morning of Tuesday 23rd May will feature six talks from internationally-renowned researchers in a number of fields in geometry. There will also be a lightning talk session for early career researchers.

Partially funded by the Heilbronn Institute for Mathematical Research.

Confirmed speakers: 

Ara Basmajian, CUNY Graduate Center

Tara Brendle, University of Glasgow 

Cornelia Drutu, University of Oxford

Dawid Kielak, University of Oxford 

Christopher Leininger, Rice University 

Hugo Parlier, University of Luxembourg 

Registration: Please register to attend via the following link. There is no fee to attend this event. Please note, registration closes on Friday 12 May, 11.45pm.

We are able to offer partial funding to early career researchers, so please indicate in the registration form whether or not you would like to request funding. If requesting funding, please ensure that you register before midday on Friday 28 April.


Monday 22nd May

13:00 - 13:50 Talk 1: Hugo Parlier, "Universal families of arcs and curves on surfaces"
14:00 - 14:50 Talk 2: Ara Basmajian, "Counting problems on the modular surface"
14:55 - 15:15 Coffee
15:20 - 16:10 Talk 3: Dawid Kielak, "Fibring, one-relator groups, and L2-homology"
16:20 - 17:20 Lightning talks for early career researchers
18:00 - 20:00 Dinner

Tuesday 23rd May

09:30 - 10:20 Talk 4: Tara Brendle, “Semi-direct product structures in mapping class groups of 3-manifolds”
10:25 - 10:45 Coffee
10:50 - 11:40 Talk 5: Christopher Leininger, "Geometry of subgroups of the mapping class group"
11:45 - 12:35 Lunch
12:40 - 13:30 Talk 6: Cornelia Drutu, “Property (T) and a-T-menability revisited”

Abstracts can be found here: Abstracts from Two-day Geometry Meeting (final) (PDF, 74kB).

Lightning talks schedule:

Harsh Patil, University of Bristol, “Asymptotic Cones”
Paweł Piwek, University of Oxford, "Group extensions: how to fill in the blank in 1 → N → __ → Q → 1"
David Sheard, King's College London, "Reflection equivalence in Coxeter groups"
Piotr Mizerka, Polish Academy of Sciences, "Spectral gaps for cohomological Laplacians of SL(n, ℤ)"
Adele Jackson, University of Oxford, “Triangulations of Seifert fibered spaces”
Bin Sun, University of Oxford, "An approach to Simon's Conjecture via the theory of division rings"
Tudur Lewis, University of Glasgow, “A Dehn surgery approach to the Birman-Craggs and Sato maps”
Riccardo Giannini, University of Glasgow, “Geometric homomorphisms and strata of translation surfaces”
Aaron Calderon, University of Chicago, "What do curves of long (hyperbolic/extremal) length look like?"
Changjie Chen, Brown University, "Morse functions on the moduli space and an investigation of its topology"

Contact information

This event is organised by Viveka Erlandsson ( and Luke Jeffreys (

For practical information please contact

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