Patrice Ossona de Mendez
Abstract: Ordnung muss sein! (Order is inevitable.) This saying , attributed to Theodore Motzkin, aptly summarizes Ramsey theory, which aims to solve problems of the form: “From what size on can a structure no longer avoid having a certain property ?”
Translated by R. Matveev in 2026 from the French original published in 2017 at Images des mathématiques
