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The inclusion of the substitution closure of linear and one-counter languages in the largest sub-AFL of the family of algebraic languages is proper. (English) Zbl 0329.68067


MSC:

68Q45 Formal languages and automata
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[1] Boasson, L., \(3^{rd}\) Ann. ACM Symp. on Theory of Computing, 116-120 (1970)
[2] Boasson, L.; Nivat, M., Acta. Informatica, 2, 180-188 (1973) · Zbl 0242.68037
[3] Chumsky, N.; Schutzenberger, M. P., Computer programming and formal systems (1963), North Holland Publishing Co: North Holland Publishing Co Amsterdam · Zbl 0108.13402
[4] Eilenberg, S., Communication au Congrès International des Mathématiciens (1970), Nice
[5] Elgot, C. C.; Mezei, J. E., IBM J. Res. and Dev., 2, 47-68 (1962) · Zbl 0135.00704
[6] Ginsburg, S., The mathematical theory of context-free languages (1966), Mc Graw-Hill · Zbl 0184.28401
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[8] Greibach, S., Math. System Theory, 4, 231-242 (1970) · Zbl 0203.30102
[9] Nivat, M., Grenoble, 18, 339-445 (1968)
[10] Nivat, M., Transduction des Langages de Chomsky, Thèse Minéographiée (1967), Paris
[11] Ogden, W., Math. System. Theory, 2, 191-194 (1968) · Zbl 0175.27802
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