Tutte colloquium-Jim Geelen

Friday, January 24, 2025 3:30 pm - 4:30 pm EST (GMT -05:00)

Title: Well-quasi-ordering and connectivity

Speaker: Jim Geelen
Affiliation: University of Waterloo
Location: MC 5501

Abstract: Connectivity systems provide an abstract framework for studying various connectivity notions on graphs, matroids, and other combinatorial structures. In joint work with Rutger Campbell, we prove a novel well-quasi-ordering result on certain connectivity systems which gives new excluded minor results in matroid theory and gives new proofs for several results in graph theory.