| 01. October 2025 |
Infinitely presented simple groups separated by homological finiteness properties. |
Operators, Graphs, Groups Programme, Newton Institute (Cambridge) |
| 26. July 2024 |
Just-infinite groups via inverse limits of finite groups. |
SCMS Seminar, Shanghai Center for Mathematical Sciences |
| 14. May 2024 |
Just-infinite groups with positive first L2-Betti number. |
Geometry and Analysis on Groups Research Seminar, University of Vienna |
| 23. April 2024 |
Just-infinite groups via iterated semidirect products. |
Seminario Teoría de Grupos, ICMAT Madrid |
| 22. March 2024 |
Just-infinite groups via iterated semidirect products. |
Topological and Homological Methods in Group Theory 2024, University of Bielefeld |
| 6. September 2023 |
From telescopes to frames and simple groups. |
Group Actions on Cantor Sets, Banff (Mexico) |
| 11. April 2023 |
From telescopes to frames and simple groups. |
Fudan Topology Seminar, Fudan University |
| 10. March 2023 |
B-telescopes and profinite completions. |
AsymptoticAlgebra 2023, FernUniversität in Hagen |
| 13. October 2022 |
Extending branch groups to simple groups and beyond. |
Norddeutsches Gruppentheorie-Kolloquium, HHU Düsseldorf |
| 21. September 2022 |
Exotic extensions of groups acting on rooted trees |
Polygons Buildings and Related Geometries, Ghent University |
| 15. December 2021 |
Amenability and profinite completions of finitely generated groups |
Mathematical Seminar, JLU Giessen |
| 6. October 2021 |
Random subcomplexes of finite buildings and application to right-angled Coxeter groups |
Buildings 2021, OVGU Magdeburg |
| 18. February 2020 |
Finiteness properties of subgroups of Borel groups |
BRIJGES, University of Bristol |
| 7. November 2019 |
The Sigma-conjecture for solvable S-arithmetic groups and Morse theory on Euclidean buildings |
Algebra/Topology Seminar, University at Albany |
| 31. October 2019 |
The Sigma-conjecture for solvable S-arithmetic groups via Morse theory on Euclidean buildings |
Geometry and Topology Seminar, Binghampton University |
| 23. October 2019 |
The Sigma-conjecture for solvable S-arithmetic groups via Morse theory on Euclidean buildings |
Max Dehn Seminar, Salt Lake City |
| 2. October 2019 |
The Sigma-conjecture for solvable S-arithmetic groups via Morse theory on Euclidean buildings |
Buildings 2019, OVGU Magdeburg |
| 13. July 2018 |
Sphericity of complexes associated to spherical buildings |
Bielefeld-Münster Seminar, University of Münster |
| 23. March 2018 |
Monod's Superrigidity Theorem |
Block-Seminar Arithmetic Groups and Rigidity, Bielefeld University |
| 22. February 2017 |
Bounded subgroups of relatively finitely presented groups |
Bielefeld-Münster Seminar, Bielefeld University |
| 2. November 2016 |
Relative exponential growth in hyperbolic groups |
Oberseminar Gruppen und Geometrie, Bielefeld University |