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math.CO2023
A collection of open problems in celebration of Imre Leader's 60th birthday
Rahil Baber, Natalie Behague, Asier Calbet +10
One of the great pleasures of working with Imre Leader is to experience his infectious delight on encountering a compelling combinatorial problem. This collection of open problems…
math.CO2023
Approximate quadratic varieties
Luka Milićević
A classical result in additive combinatorics, which is a combination of Balog-Szemerédi-Gowers theorem and a variant of Freiman's theorem due to Ruzsa, says that if a subset of…