EntityQ729271· pop 23· linked from 142 articlescontext-free languageSign in to saveformal language that is a member of the set of languages defined by context-free grammarsConnectionsformal languageEntityregular languageEntityInternational Standard Book NumberEntityprogramming languageEntitydigital object identifierEntityDonald KnuthEntityTuring machineEntitysubsetEntityunionEntityQ118398Entityfinite-state machineEntityautomata theoryEntityparsingEntitybig O notationEntityChomsky hierarchyEntityQ22908627Entitymatrix multiplicationEntityformal grammarEntityclosureEntitycontext-free grammarEntityCategoriesFormal languagesSyntax