EntityQ2292874· pop 17· linked from 16 articlespumping lemma for regular languagesSign in to savetype of pumping lemmaConnectionsfinite-state machineEntitystringEntityregular languageEntityInternational Standard Book NumberEntitydigital object identifierEntityTuring machineEntitysubsetEntityregular expressionEntityformal languageEntitylemmaEntitypigeonhole principleEntityautomata theoryEntityreductio ad absurdumEntityChomsky hierarchyEntityDana ScottEntityformal grammarEntityAmerican Mathematical SocietyEntityMichael O. RabinEntitycontext-free grammarEntitypushdown automatonEntityCategoriesFinite-state machinesFormal languagesLemmas