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On the existence of finite models and decision procedures for propositional calculi

Published online by Cambridge University Press:  24 October 2008

R. Harrop
R. Harrop
Affiliation:
King's CollegeNewcastle upon Tyne
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Extract

1. Introduction. In this paper we consider certain general properties of propositional calculi. Two forms of the definition of a finite model of such a calculus are discussed, these forms differing in the manner prescribed for the satisfaction of the rules of the calculus. The methods of definition are shown to be equivalent for the application of the finite model method for the demonstration of the unprovability of formulae in the calculus. It is further proved that, although the decidability of a calculus follows from the existence of a finite model counter-example for each unprovable formula of the calculus, the converse result is not true.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 54 , Issue 1 , January 1958 , pp. 1 - 13
Copyright
Copyright © Cambridge Philosophical Society 1958

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References

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