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Independence results in computer science

Published: 01 October 1976 Publication History

Abstract

In this note we show that instances of problems which appear naturally in computer science cannot be answered in formalized set theory. We show, for example, that some relativized versions of the famous P = NP problem cannot be answered in formalized set theory, that explicit algorithms can be given whose running time is independent of the axioms of set theory, and that one can exhibit a specific context-free grammar G for which it cannot be proven in set theory that L(G) = Σ* or L(G) ≠ Σ*.

References

[1]
Aho, A. V., J. E. Hopcroft and J. D. Ullman, The Design and Analysis of Computer Algorithms," Addison-Wesley Publishing Co., Reading, Mass., 1974.
[2]
Baker, T., J. Gill and R. Solovay, "Relativizations of the P = ?NP Question," SIAM J. on Comp. 4:4 (1975), pp. 431--442.
[3]
Bernays, P., and A. A. Fraenkel, "Axiomatic Set Theory," North Holland Publ., Amsterdam, 1958.
[4]
Blum, M., "A machine-independent theory of recursive functions," JACM 14:2 (1964), pp. 322--336.
[5]
Hartmanis, J. and J. Simon, "On the structure of feasible computations" in Advances in Computers Vol. 14 (Edits. Morris Rubinoff and Marshall C. Yovits), Academic Press, New York, N.Y., 1976. pp. 1--43.
[6]
Hopcroft, J. E. and J. D. Ullman, "Formal Languages and Their Relation to Automata," Addison-Wesley, Reading, Mass., 1969.
[7]
Matijasevic, Y. "Enumerable sets are Diophantine" (Russian), Dokl. Acad. Nauk. SSSR 191 (1970), pp. 279--282.
[8]
Rogers, Hartly, Jr., "Theory of Recursive Functions and Effective Computability," McGraw-Hill, New York, N.Y., 1967.

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  1. Independence results in computer science

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    cover image ACM SIGACT News
    ACM SIGACT News  Volume 8, Issue 4
    October-December 1976
    31 pages
    ISSN:0163-5700
    DOI:10.1145/1008335
    Issue’s Table of Contents

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    Association for Computing Machinery

    New York, NY, United States

    Publication History

    Published: 01 October 1976
    Published in SIGACT Volume 8, Issue 4

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