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Decidability and undecidability of extensions of second (first) order theory of (generalized) successor1

Published online by Cambridge University Press:  12 March 2014

Calvin C. Elgot  and
Michael O. Rabin
Calvin C. Elgot
Affiliation:
Ibm Watson Research Center Yorktown Heights, New YorkNew York University, Hebrew University
Michael O. Rabin
Affiliation:
Ibm Watson Research Center Yorktown Heights, New YorkNew York University, Hebrew University
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Extract

We study certain first and second order theories which are semantically defined as the sets of all sentences true in certain given structures. Let be a structure where A is a non-empty set, λ is an ordinal, and Pα is an n(α)-ary relation or function4 on A. With we associate a language L appropriate for which may be a first or higher order calculus. L has an n(α)-place predicate or function constant P for each α < λ. We shall study three types of languages: (1) first-order calculi with equality; (2) second-order monadic calculi which contain monadic predicate (set) variables ranging over subsets of A; (3) restricted (weak) second-order calculi which contain monadic predicate variables ranging over finite subsets of A.

Information

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 31 , Issue 2 , June 1966 , pp. 169 - 181
Copyright
Copyright © Association for Symbolic Logic 1966

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Footnotes

1

Presented to the American Mathematical Society in January, 1963 under the titles “Decision Problems of Extensions of Second Order Theory of Successor” and “On the First Order Theory of Generalized Successor”.

References

REFERENCES

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