The Admissible Rules of BD2 and GSc

Jeroen P. Goudsmit

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The Visser rules form a basis of admissibility for the intuitionistic propositional calculus. We show how one can characterize the existence of covers in certain models by means of formulae. Through this characterization, we provide a new proof of the admissibility of a weak form of the Visser rules. Finally, we use this observation, coupled with a description of a generalization of the disjunction property, to provide a basis of admissibility for the intermediate logics BD2 and GSc.
Original languageEnglish
Pages (from-to)325-353
Number of pages29
JournalNOTRE DAME JOURNAL OF FORMAL LOGIC
Volume59
Issue number3
Early online date2 Aug 2017
DOIs
Publication statusPublished - 2018

Funding

Support by the Netherlands Organization for Scientific Research under grant 639.032.918 is gratefully acknowledged. The author would like to thank the anonymous referee for their helpful comments.

FundersFunder number
Netherlands Organization for Scientific Research639.032.918

    Keywords

    • admissible rules
    • intermediate logics
    • intuitionistic logic
    • universal model

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