Home›Combinatorics and Graph Theory›Proof Method›ContradictionBrowse ByContradictionFactsContradictionSourcesComments (0)Reader Challenges (0)FactsComparisonEra Of EmergenceWell-attested1950 1ContradictionFilter Results3 entriesBranchAllCombinatorics (1)Graph Theory (2)Topic AreaAllEnumerative, Additive and Algebraic Combinatorics (1)Graph Theory (2)ProvedAll1950 (1)1952 (1)1960 (1)Proved ByAllRobert P. Dilworth (1)Øystein Ore (1)Statement FormAllExistence Theorem (1)Inequality (2)Show ResultsBrowseCompareSelect all 3Dilworth's TheoremContradictionDirac's TheoremContradictionOre's TheoremContradictionSources1. Wikipedia: Combinatoricstier 2Wikimedia FoundationHistory sectionQuote, History sectionIn the later twentieth century, however, powerful and general theoretical methods were developed, making combinatorics into an independent branch of mathematics in its own right.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.