Free Access
Issue
RAIRO. Inform. théor.
Volume 14, Number 4, 1980
Page(s) 349 - 369
DOI https://doi.org/10.1051/ita/1980140403491
Published online 01 February 2017
  1. 1. K. CULIK II, A Purely Homomorphic Characterization of Recurively Enumerable Sets, J. Assoc. Comput. Mach., Vol. 26, 1979, pp. 345-350. [MR: 528036] [Zbl: 0395.68076]
  2. 2. K. CULIK II, On Homomorphic Characterization of Families of Languages. Proceedings of the Six Inter. Colloquium an Automata, Languages and Programrning, Graz, Austria, pp. 161-170, July 1979. [MR: 573239] [Zbl: 0412.68064]
  3. 3. K. CULIK II and I. FRIS, The Decidability of the Equivalence Problem for DOL Systems, Inf. and Control, Vol. 35, 1977, pp.20-39. [MR: 449030] [Zbl: 0365.68074]
  4. 4. K. CULIK II and A. SALOMAA, On the Decidability of Homomorphism Equivalence for Languages, J. Comp. System Sc., Vol. 17, 1978, pp.163-175. [MR: 514269] [Zbl: 0389.68042]
  5. 5. K. CULIK II and A. SALOMAA, Test Sets and Checking words for Homomorphism Equivalence, J. Comp. System Sc., Vol. 20, 1980, pp. 379-395. [MR: 584866] [Zbl: 0451.68046]
  6. 6. K. CULIK II and H. A. MAURER, On Simple Representations of Language Families, R.A.I.R.O., Informatique théorique/Theoretical Informatics, Vol. 13, No. 3, 1979, pp. 241-250. [EuDML: 92102] [MR: 554685] [Zbl: 0432.68052]
  7. 7. A. EHRENFEUCHT and G. ROZENBERG, Elementary Homomorphisms and a Solution to the DOL Sequence Equivalence Problem, Theoretical Computer Science, Vol. 7, 1978, pp. 169-183. [MR: 509015] [Zbl: 0407.68085]
  8. 8. J. ENGELFRIET and G. ROZENBERG, Equality Languages and Fixed Point Languages, Inf. and Control, Vol. 43, 1979, pp. 20-49. [MR: 549263] [Zbl: 0422.68034]
  9. 9. J. KARHUMAKI and I. SIMON, A Note on Elementary Homomorphisms and the Regularity of Equality Sets, Bulletin E.A.T.C.S., No, 9, October 1979, pp. 16-24,
  10. 10. R. C. LYNDON and M. P. SCHUTZENBERGER, The Equation aM=bN cP in a Free Group, Michigan Math. J., Vol.9, 1962, pp. 289-298. [MR: 162838] [Zbl: 0106.02204]
  11. 11. G. S. MAKANIN, The Problem of Solvability of Equations in a Free Semigroup (in Russian), Matematiceskij Sbornik, Vol. 103, No. 145, 1977, pp. 148-236. [MR: 470107] [Zbl: 0371.20047]
  12. 12. A. SALOMAA, Equality Sets for Homomorphisms of Free Monoids, Acta Cybernetica, Vol. 4, 1978, pp.127-139. [MR: 521458] [Zbl: 0407.68077]
  13. 13. A. SALOMAA, DOL Equivalence: The Problem of Iterated Morphisms, Bulletin E.A.T.C.S., No. 4, January 1978, pp. 5-12

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