Inga
Valentiner-Branth

Doctoral Reseracher

Ghent University

Biography

I'm a PhD student in Mathematics at Ghent University under the supervision of Tom De Medts. My position is part of the EOS-project "High-dimensional expanders and Kac-Moody-Steinberg groups" which is in cooperation with Pierre-Emmanuel Caprace and Timothée Marquis from UCLouvain. My main focus is on constructing new high-dimensional expanders using the rich structure provided by Kac-Moody-Steinberg groups. This involves studying buildings, in particular their opposition complexes, simplicial (co)homology theory as well as various aspects of group theory, geometry and combinatorics. In my free time, I like to play ultimate frisbee and bake fresh sourdough bread.

Interests

High-dimensional expander
Kac-Moody theory, in particular Kac-Moody-Steinberg groups
Buildings

Papers

New cosystolic high-dimensional expanders from KMS groups @misc{oppenheim2025newcosystolichighdimensionalexpanders,
title={New cosystolic high-dimensional expanders from KMS groups},
author={Izhar Oppenheim and Inga Valentiner-Branth},
year={2025},
eprint={2504.05823},
archivePrefix={arXiv},
primaryClass={math.CO},
url={https://arxiv.org/abs/2504.05823},
}
joint with Izhar Oppenheim, preprint (2025)
High-dimensional expanders from Kac-Moody-Steinberg groups @article{GRAVEDEPERALTA2025104131,
title = {High-dimensional expanders from Kac–Moody–Steinberg groups},
author = {Laura {Grave de Peralta} and Inga Valentiner-Branth},
journal = {European Journal of Combinatorics},
volume = {126},
pages = {104131},
year = {2025},
issn = {0195-6698},
doi = {https://doi.org/10.1016/j.ejc.2025.104131},
url = {https://www.sciencedirect.com/science/article/pii/S0195669825000137},
}
joint with Laura Grave de Peralta, European Journal of Combinatorics (2025)
Magic squares: Latin, semiclassical, and quantum @article{10.1063/5.0127393,
author = {De las Cuevas, Gemma and Netzer, Tim and Valentiner-Branth, Inga},
title = {Magic squares: Latin, semiclassical, and quantum},
journal = {Journal of Mathematical Physics},
volume = {64},
number = {2},
pages = {022201},
year = {2023},
month = {02},
issn = {0022-2488},
doi = {10.1063/5.0127393},
url = {https://doi.org/10.1063/5.0127393},
}
joint with Gemma De las Cuevas and Tim Netzer, Journal of Mathematical Physics (2023)

Conferences and Talks

I am co-organizing the summer school "Homological Methods in Group Theory and Topology" at Ghent University, June 10-13,2025. More information can be found here.

I plan to go to the following conferences. A list of conferences I attended in the past can be found here.

Buildings, Louvain la Neuve, September 8-12
Loop groups and Kac-Moody groups, Willebadessen, September 22-26

Education

Doctoral researcher
Sept. 2022 - ongoing, Ghent University
Erasmus Semester
Sept. 2021 - Jan. 2022, Budapest, Hungary
Master of Mathematics
2019-2022, University of Innsbruck
Erasmus Semester
Aug. 2018 - Dec. 2018, Bergen, Norway
Bachelor of Mathematics
2016-2019, University of Innsbruck

Inga Valentiner-Branth