Mathieu Rundström

I am a PhD student in the Combinatorics and Optimization department at the University of Waterloo, advised by Jim Geelen. My research is in combinatorics, more specifically structural and extremal graph and matroid theory.

Office: MC 5481
Email: mrundstr@uwaterloo.ca

Research

My current focus is on understanding combinatorial objects close to regular matroids. I also enjoy working on some graph colouring problems, and structural questions on tournaments.

Submitted / Accepted

• The structure of Δ(1, 2, 2)-free tournaments (with S. Kim, T. LaGrange, A. Sadhukhan, S. Spirkl). Submitted. [arXiv:2511.03234]
• An improved upper bound for the multicolour Ramsey number of odd cycles (with M. Axenovich, W. Cames van Batenburg, O. Janzer, L. Michel). Submitted. [arXiv:2510.17981]