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Bull's Theorem by the Method of Diagrams

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Abstract

We show how to use diagrams in order to obtain straightforward completeness theorems for extensions of K4.3 and a very simple and constructive proof of Bull's theorem: every normal extension of S4.3 has the finite model property.

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References

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Authors and Affiliations

  1. Dipartimento di Filosofia, Università di Bologna, via Zamboni, 38, 40126, Bologna, Italy

    Giovanna Corsi

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  1. Giovanna Corsi
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Corsi, G. Bull's Theorem by the Method of Diagrams. Studia Logica 62, 163–176 (1999). https://doi.org/10.1023/A:1026447418461

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  • DOI: https://doi.org/10.1023/A:1026447418461

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