EntityQ2226786· pop 7· linked from 18 articlesSperner's theoremSign in to savetheorem on the largest antichain of setsConnectionspartially ordered setEntityDilworth's theoremEntityInternational Standard Book NumberEntitydigital object identifierEntitydiscrete mathematicsEntityPaul ErdősEntityQ118398Entitypower setEntityfinite setEntityprojective geometryEntityQ22908627Entityfinite fieldEntityHandle SystemEntityEncyclopedia of MathematicsEntityMathematical ReviewsEntityzbMATH OpenEntityEuropean Mathematical SocietyEntityGian-Carlo RotaEntityantichainEntityfamily of setsEntityCategoriesFactorial and binomial topicsFamilies of sets