An hierarchy between context-free and co
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Takumi Kasai
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Article
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1970
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Elsevier Science
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English
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Infinite subfamilies ~l, ~ .... , -oq'~o, .W,~ of the family consisting of contextsensitive languages, are introduced such that .2'~ ~z~ ..-C ~| ~o,where 9 LP a is the family of e-free context-free languages, Ld,o is the family of context-sensitive languages, and each L/', is an Abstract Family of L