Definition
Ramsey theory, named after the British mathematician and philosopher Frank P. Ramsey, is a branch of the mathematical field of combinatorics that focuses on the appearance of order in a substructure given a structure of a known size. Problems in Ramsey theory typically ask a question of the form: "how big must some structure be to guarantee that a particular property holds?"
Related concepts
Ackermann functionArithmetic progressionBartel Leendert van der WaerdenBoolean Pythagorean triples problemBruce L. RothschildBrute-force searchCombinatoricsComplete graphCompositio MathematicaDiscrepancy theoryErgodic Ramsey theoryExponential growthExtremal graph theoryFrank P. RamseyGeorge SzekeresGoodstein's theoremGraham's numberHales–Jewett theoremHillel FurstenbergHindman's theoremInfinitary combinatoricsJoel H. SpencerJournal d'Analyse MathématiqueJózsef SolymosiMathematical proofMilliken–Taylor theoremNon-constructiveParis–Harrington theoremPartition regularityPaul ErdősPigeonhole principlePrimitive recursiveRado's theorem (Ramsey theory)Rado–Folkman–Sanders theoremRamsey's theoremRonald L. GrahamSchur's theoremSteve Butler (mathematician)Sunflower (mathematics)Szemerédi's theoremTheorem on friends and strangersTic-tac-toeTurán's theoremVan der Waerden's theoremYitzhak Katznelson
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