Notre Dame Journal of Formal Logic

Propositional Logics of Closed and Open Substitutions over Heyting's Arithmetic

Albert Visser
Source: Notre Dame J. Formal Logic Volume 47, Number 3 (2006), 299-309.

Abstract

In this note we compare propositional logics for closed substitutions and propositional logics for open substitutions in constructive arithmetical theories. We provide a strong example where these logics diverge in an essential way. We prove that for Markov's Arithmetic, that is, Heyting's Arithmetic plus Markov's principle plus Extended Church's Thesis, the logic of closed and the logic of open substitutions are the same.

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Primary Subjects: 03F50
Secondary Subjects: 03F30, 03B20
Links and Identifiers

Permanent link to this document: http://projecteuclid.org/euclid.ndjfl/1163775437
Digital Object Identifier: doi:10.1305/ndjfl/1163775437
Mathematical Reviews number (MathSciNet): MR2264699
Zentralblatt MATH identifier: 1113.03053

References

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Project Euclid: euclid.ndjfl/1093635833
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Notre Dame Journal of Formal Logic

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