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Acta Informatica

, Volume 1, Issue 4, pp 336–344 | Cite as

On non-determinancy in simple computing devices

  • Juris Hartmanis
Article

Summary

This paper studies one-tape Turing machines with k read-only heads which are restricted to the original input. The main result shows that if any set accepted by such a 3-head non-deterministic Turing machine can be accepted by a deterministic Turing machine with more read-only heads, then the deterministic and non-deterministic context-sensitive languages are identical. Several related results are derived and some tantalizing open problems are discussed.

Keywords

Information System Operating System Data Structure Communication Network Information Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Juris Hartmanis
    • 1
  1. 1.Gesellschaft für Mathematik und Datenverarbeitung mbH BonnSt. AugustinFederal Republic of Germany

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