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On the Hotz group of a context-free grammar. (English) Zbl 0495.68066


MSC:

68Q45 Formal languages and automata
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[1] Anisimov, A.V., Seifert, F.D.: Zur algebraischen Charakteristik der durch kontextfreie Sprachen definierten Gruppen. Elektronische Informationsverarbeitung und Kybernetik11, 695-702 (1975) · Zbl 0322.68047
[2] Boasson, L.: Dérivations et réductions dans les grammaires algébriques. In: Proc. of the 7th I.C.A.L.P., Lecture Notes in Computer Science85, 109-118 (1980)
[3] Clifford, A., Preston, G.: The algebraic theory of semigroups. Amer. Math. Soc., Vol.1 (1961), Vol.2 (1967) · Zbl 0111.03403
[4] Frougny, Ch.: Simple deterministic NTS languages. Information Processing Letters12 (4), 174-178 (1981) · Zbl 0482.68067 · doi:10.1016/0020-0190(81)90094-6
[5] Harrison, M.: Introduction to Formal Language Theory. Addison Wesley 1978 · Zbl 0411.68058
[6] Hotz, G.: Eine neue Invariante für kontexfreie Sprachen. Theoret. Computer Sci.11, 107-116 (1980) · Zbl 0447.68089 · doi:10.1016/0304-3975(80)90040-7
[7] Hotz, G.: Über die Darstellbarkeit des syntaktischen Monoides kontextfreier Sprachen. R.A.I.R.O. Informatique théorique13, 337-345 (1979) · Zbl 0428.68085
[8] Lang, S.: Algebra. Addison Wesley 1965
[9] Muller, D.E., Schupp, P.E.: Pushdown automata, graphs, ends, second-order logic, and reachability problems. In: Proc. of the 13th symposium on Theory of Computing, 46-54 (1981)
[10] Sakarovitch, J.: Syntaxe des langages de Chomsky. Th. Sci. Math., Univ. Paris VII, Paris 1979
[11] Senizergues, G.: Décidabilité de l’équivalence des grammaires N.T.S. Thèse 3ème cycle Math., Univ. Paris VII, Paris 1981 · Zbl 0482.68066
[12] Valkema, E.: Einige Zusammenhänge zwischen Halbgruppen und formale Sprachen. Diplomarbeit, Kiel 1970
[13] Valkema, E.: On some relations between formal languages and groups. In: Proc. of ?Categorical and Algebraic Methods in Computer Science and System Theory?, Univ. Dortmund, 116-123 (1978)
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