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The decidability of craig’s interpolation property in well-composed J-logics

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Abstract

Under study are the extensions of Johansson’s minimal logic J. We find sufficient conditions for the finite approximability of J-logics in dependence on the form of their axioms. Using these conditions, we prove the decidability of Craig’s interpolation property (CIP) in well-composed J-logics. Previously all J-logics with weak interpolation property (WIP) were described and the decidability of WIP over J was proved. Also we establish the decidability of the problem of amalgamability of well-composed varieties of J-algebras.

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Correspondence to L. L. Maksimova.

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The author was supported by the Russian Foundation for Basic Research (Grant 09-01-00090-a), and the Program “Development of the Scientific Potential of Higher School” of the Ministry for Education of the Russian Federation (Grant 2.1.1.10726).

Original Russian Text Copyright © 2012 Maksimova L.L.

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Novosibirsk. Translated from Sibirskiı Matematicheskiı Zhurnal, Vol. 53, No. 5, pp. 1048–1064, September–October, 2012.

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Maksimova, L.L. The decidability of craig’s interpolation property in well-composed J-logics. Sib Math J 53, 839–852 (2012). https://doi.org/10.1134/S0037446612050096

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