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Speaker: Lior Gishboliner (University of Toronto)

Title: VC-dimension for hypergraphs: improved bounds 

Abstract: VC-dimension is an important notion with several applications in graph theory. A fundamental result is that graphs of bounded VC dimension have (small) homogeneous vertex-partitions, i.e., partitions where almost every pair of parts has density close to 0 or 1. Recently, Chernikov and Towsner proved a hypergraph generalization of this fact. The quantitative aspects of their result remain open. I will present some recent progress on this problem, answering two questions of Terry. This is a joint work with Asaf Shapira and Yuval Wigderson.