All Finitely Axiomatizable Normal Extens
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Michael Zakharyaschevm; Alexander Alekseev
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Article
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1995
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John Wiley and Sons
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English
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We use the apparatus of the canonical formulas introduced by Zakharyaschev [lo] to prove that all finitely axiomatizable normal modal logics containing K4.3 are decidable, though possibly not characterized by classes of finite frames. Our method is purely frame-theoretic. Roughly, given a normal log