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A homomorphic characterization of principal semi AFLs without using intersection with regular sets. (English) Zbl 0506.68063


MSC:

68Q45 Formal languages and automata
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References:

[1] Culik, K.; Fich, F. E.; Salomaa, A., A homomorphic characterization of regular languages, Discrete Appl. Math., 4, 149-152 (1982) · Zbl 0481.68069
[2] Ginsburg, S., Algebraic and Automata-Theoretic Properties of Formal Languages (1975), North-Holland · Zbl 0325.68002
[3] Greibach, S.; Hopcroft, J., Independence of AFL operations, (Studies in Abstract Families of Languages. Studies in Abstract Families of Languages, Memoirs of the American Mathematical Society, No. 87 (1969)), 33-40 · Zbl 0194.31402
[4] Salomaa, A., Theory of Automata (1969), Pergamon · Zbl 0193.32901
[5] Salomaa, A., Jewels of Formal Language Theory (1981), Computer Science Press · Zbl 0487.68063
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