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Undecidability of the Problem of Recognizing Axiomatizations of Superintuitionistic Propositional Calculi

Undecidability of the Problem of Recognizing Axiomatizations of Superintuitionistic Propositional... Abstract We give a new proof of the following result (originally due to Linial and Post): it is undecidable whether a given calculus, that is a finite set of propositional formulas together with the rules of modus ponens and substitution, axiomatizes the classical logic. Moreover, we prove the same for every superintuitionistic calculus. As a corollary, it is undecidable whether a given calculus is consistent, whether it is superintuitionistic, whether two given calculi have the same theorems, whether a given formula is derivable in a given calculus. The proof is by reduction from the undecidable halting problem for the so-called tag systems introduced by Post. We also give a historical survey of related results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Studia Logica" Springer Journals

Undecidability of the Problem of Recognizing Axiomatizations of Superintuitionistic Propositional Calculi

"Studia Logica" , Volume 102 (5): 19 – Oct 1, 2014

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References (40)

Publisher
Springer Journals
Copyright
2013 Springer Science+Business Media Dordrecht
ISSN
0039-3215
eISSN
1572-8730
DOI
10.1007/s11225-013-9520-5
Publisher site
See Article on Publisher Site

Abstract

Abstract We give a new proof of the following result (originally due to Linial and Post): it is undecidable whether a given calculus, that is a finite set of propositional formulas together with the rules of modus ponens and substitution, axiomatizes the classical logic. Moreover, we prove the same for every superintuitionistic calculus. As a corollary, it is undecidable whether a given calculus is consistent, whether it is superintuitionistic, whether two given calculi have the same theorems, whether a given formula is derivable in a given calculus. The proof is by reduction from the undecidable halting problem for the so-called tag systems introduced by Post. We also give a historical survey of related results.

Journal

"Studia Logica"Springer Journals

Published: Oct 1, 2014

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