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Basic formulas and languages. I: The theory. (English) Zbl 0488.68047


MSC:

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

[1] Ehrenfeucht, A.; Rozenberg, G.; Verraedt, R., Many-to-one simulation in E0L forms is decidable, Discrete Appl. Math, 2, 73-76 (1980) · Zbl 0442.68071
[2] Harrison, M., Introduction to Formal Language Theory (1978), Addison-Wesley: Addison-Wesley Reading, MA · Zbl 0411.68058
[3] Higman, G., Ordering by divisibility in abstract algebras, Proc. London Math. Soc., 2, Ser. 3, 326-336 (1952) · Zbl 0047.03402
[4] Kruskal, J. B., The theory of well-quasi-ordering: a frequently discovered concept, J. Combinatorial Theory, 13, A, 297-305 (1972) · Zbl 0244.06002
[5] Maurer, H. A.; Salomaa, A.; Wood, D., E0L forms, Acta Informatica, 8, 75-96 (1977) · Zbl 0348.68046
[6] Rozenberg, G.; Salomaa, A., The Mathematical Theory of L Systems (1980), Academic Press: Academic Press New York · Zbl 0365.68072
[7] Salomaa, A., Formal Languages (1973), Academic Press: Academic Press New York · Zbl 0262.68025
[8] Wood, D., Grammar and L Forms: An Introduction (1980), Springer-Verlag: Springer-Verlag Berlin · Zbl 0521.68085
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