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The equivalence problem for deterministic TOL-systems is undecidable. (English) Zbl 0267.68033


MSC:

68Q45 Formal languages and automata
03D03 Thue and Post systems, etc.
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References:

[1] Ginsburg, S., The mathematical theory of context free languages (1966), McGraw-Hill: McGraw-Hill New York · Zbl 0184.28401
[2] Hopcroft, J. E.; Ullman, J. D., Format languages and their relation to automata (1969), Addison-Wesley: Addison-Wesley Reading, Massachusetts · Zbl 0196.01701
[3] Lindenmayer, A., Mathematical models for cellular interactions in development, J. Theoret. Biol., 18, 280 (1968), Parts I and II
[4] Lindenmayer, A.; Rozenberg, G., Developmental systems and languages, Proc. ACM Symposium on Theory of Computing (1972) · Zbl 0353.68087
[5] Pest, E. L., A variant of a recursively unsolvable problem, Bull. Am. Math. Soc., 52, 264 (1946) · Zbl 0063.06329
[6] Rozenberg, G., T0L systems and languages, Information and Control (1972), to appear
[7] S. Greibach, private communication.; S. Greibach, private communication.
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