Past online ALT seminars

December 02nd, 2025 — 15:00 (Europe/Lisbon) — Google Meet
Categorical and metric density
Tom Leinster — The University of Edinburgh, Scotland

Abstract (PDF)

December 02nd, 2025 — 16:00 (Europe/Lisbon) — Google Meet
N-fold groupoids and n-groupoids in regular Mal’tsev categories
Nadja Egner — UCLouvain, Belgium

Abstract (PDF)

October 07th, 2025 — 15:00 (Europe/Lisbon) — Google Meet
When are exact categories co-exact?
James Gray — Stellenbosch University, South Africa

Abstract (PDF) Slides (PDF)

October 07th, 2025 — 16:00 (Europe/Lisbon) — Google Meet
Noncommutative Poisson structure and invariants of matrices
Xabier García-Martínez — Universidade de Santiago de Compostela, Spain

Abstract (PDF) Slides (PDF)

August 19th, 2025 — 11:00 (Europe/Lisbon) — Google meet
Drazin Inverses in (Dagger) Categories
JS Lemay — Macquarie University, Australia

Abstract (PDF) Slides (PDF)

August 19th, 2025 — 12:00 (Europe/Lisbon) — Google meet
A general approach to pointfree T0 spaces
Anna Laura Suarez — University of the Western Cape, South Africa

Abstract (PDF) Slides (PDF)

May 20th, 2025 — 15:00 (Europe/Lisbon) — Microsoft Teams
Self-dual aspects of semi-abelian categories
Tim Van der Linden — Université catholique de Louvain & Vrije Universiteit Brussel, Belgium

Abstract (PDF)

May 20th, 2025 — 16:00 (Europe/Lisbon) — Microsoft Teams
Norms for vectors, linear operators and morphisms of categories, and Cauchy convergence for them
Walter Tholen — York University, Canada

Abstract (PDF)