EntityQ4284941· pop 5· linked from 1 articlesmatrix grammarSign in to savea formal grammar in which instead of single productions, productions are grouped together into finite sequences, which are referred to as matricesConnectionsdigital object identifierEntityunionEntityintersectionEntityif and only ifEntityformal grammarEntitycontext-free grammarEntityconcatenationEntitycontext-free languageEntitycontext-sensitive grammarEntitycontext-sensitive languageEntityrecursively enumerable setEntityCategoriesFormal languages