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A characterization of context-free languages. (English) Zbl 0226.68035


MSC:

68Q45 Formal languages and automata
68Q42 Grammars and rewriting systems
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References:

[1] Banerji, R. B., Phrase structure languages, finite machines and channel capacity, Information and Control, 6, 153-162 (1963) · Zbl 0115.37008
[2] Brzozowski, Y. A., Regular-Like Expressions for Some Irregular Languages, (IEEE Conference record of 1968, Ninth Annual Symposium on Switching and Automata Theory (1968)), 278-280
[3] Ginsburg, S.; Spanier, E. H., Finite-turn pushdown automata, SIAM J. Control, 4, 429-453 (1966) · Zbl 0147.25302
[4] Ginsburg, S.; Spanier, E. H., Derivation-Bounded Languages, J. Comput. System Sci., 2, 228-250 (1968) · Zbl 0176.16703
[5] Greibach, S. A., Full AFL’s and Nested Iterated Substitution, (IEEE Conference record of 1969 Tenth Annual Symposium on Switching and Automata Theory (1969)), 222-230
[6] Gruska, J., Generalization of Regular Sets, (Abstracts of the Mathematics Congress. Abstracts of the Mathematics Congress, Moscow (1966)) · Zbl 0135.25201
[7] Gruska, J., On a Classification of context-free grammars, Kybernetika Prague, 3, 22-29 (1967) · Zbl 0158.25401
[8] Yntema, M. K., Inclusion relations among families of context-free languages, Information and Control, 10, 572-597 (1967) · Zbl 0207.31405
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