Büro: 48-420

Tel.: +49 (0)631 205 2731

Gottlieb-Daimler-Straße 47

67663 Kaiserslautern

Germany

Depending on when you read this, and on when I last updated this page, I am a Postdoc in the algebra department (AGAG) at the RPTU University Kaiserslautern–Landau with Professor Ulrich Thiel, or I will have been one, until 30 September 2026. I am currently looking for another postdoc position, to continue working with diagrams. Here is a picture with the hat.

My CV (12.6.26).

news

Sep 05, 2026	The new Julia package DiagrammaticHecke.jl is finally out. You can now compute with morphisms in the diagrammatic Hecke category in type $A_3$. More types are coming.
Sep 02, 2026	Back from Uppsala, where I gave a talk on circular leaves for the diagrammatic Hecke category in type $A_3$ — the slides are on my talks page. The Julia package `DiagrammaticHecke.jl` that grew out of this work is coming soon.
Jul 23, 2026	Last minute summer update. On August 5, I will speak at TU Berlin in the Seminar der Arbeitsgruppen Diskrete Mathematik/Geometrie & Diskrete Geometrie about “Circular double leaves in the diagrammatic Hecke category”.

older news →

selected publications

Idempotents, traces, and dimensions in Hecke categories

Ben Elias, Liam Rogel, and Daniel Tubbenhauer

2025

Bib

@misc{elias2025idempotentstracesdimensionshecke,
  title = {Idempotents, traces, and dimensions in Hecke categories},
  author = {Elias, Ben and Rogel, Liam and Tubbenhauer, Daniel},
  year = {2025},
  archiveprefix = {arXiv},
  primaryclass = {math.RT},
  url = {https://arxiv.org/abs/2507.10061},
}

The center of the asymptotic Hecke category and unipotent character sheaves

Liam Rogel and Ulrich Thiel

Representation Theory, 2026

DOI arXiv Bib HTML

@article{rogel2026centerasymptoticheckecategory,
  title = {The center of the asymptotic Hecke category and unipotent character sheaves},
  author = {Rogel, Liam and Thiel, Ulrich},
  journal = {Representation Theory},
  volume = {30},
  pages = {196--227},
  year = {2026},
  publisher = {American Mathematical Society},
  doi = {10.1090/ert/714},
}

DiagrammaticHecke.jl: a Julia package for the diagrammatic Hecke category

Liam Rogel

2026+

In preparation

Bib HTML Code

@software{DiagrammaticHecke,
  author = {Rogel, Liam},
  title = {{DiagrammaticHecke.jl}: a {J}ulia package for the diagrammatic {H}ecke category},
  year = {2026+},
  note = {In preparation},
  url = {https://github.com/rogeliam/DiagrammaticHecke.jl},
}