Wed, 21 May 2025
16:00
16:00
L2
Fat minors and where to find them
Joseph MacManus
(University of Oxford)
Abstract
Recently, much attention has been paid to the intersection between coarse geometry and graph theory, giving rise to the fresh, exciting new field aptly known as ‘coarse graph theory’. One aspect of this area is the study of so-called ‘fat minors’, a large-scale analogue of the usual idea of a graph minor.
In this talk, I will introduce this area and motivate some interesting questions and conjectures. I will then sketch a proof that a finitely presented group is either virtually planar or contains arbitrarily ‘fat’ copies of every finite graph.
No prior knowledge or passion for graph theory will be assumed in this talk.