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A homomorphic characterization of regular languages. (English) Zbl 0481.68069


MSC:

68Q45 Formal languages and automata
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References:

[1] Culik, K., A purely homomorphic characterization of recursively enumerable sets, J. assoc. comput. Mach., 26, 345-350, (1979) · Zbl 0395.68076
[2] Culik, K., Homomorphisms: decidability, equality and test sets, (), 167-194
[3] Culik, K.; Maurer, H.A., On simple representations of language families, Rairo, 13, 241-250, (1979) · Zbl 0432.68052
[4] Salomaa, A., Formal languages, (1973), Academic Press New York · Zbl 0262.68025
[5] Salomaa, A., Jewels in formal language theory, (1981), Computer Science Press · Zbl 0487.68063
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