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Semantics for a basic relevant logic with intensional conjunction and disjunction (and some of its extensions)

Published online by Cambridge University Press:  01 February 2008

YING GAO
Affiliation:
Department of Information and Computer Sciences, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama, 338-8570, Japan Email: gaoying@aise.ics.saitama-u.ac.jp, cheng@aise.ics.saitama-u.ac.jp
JINGDE CHENG
Affiliation:
Department of Information and Computer Sciences, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama, 338-8570, Japan Email: gaoying@aise.ics.saitama-u.ac.jp, cheng@aise.ics.saitama-u.ac.jp

Abstract

This paper proposes a new relevant logic B+⊓⊔, which is obtained by adding two binary connectives, intensional conjunction ⊓ and intensional disjunction ⊔, to Meyer–Routley minimal positive relevant logic B+, where ⊓ and ⊔ are weaker than fusion ˚ and fission +, respectively. We give Kripke-style semantics for B+⊓⊔, with →, ⊓ and ⊔ modelled by ternary relations. We prove the soundness and completeness of the proposed semantics. A number of axiomatic extensions of B+⊓⊔, including negation-extensions, are also considered, together with the corresponding semantic conditions required for soundness and completeness to be maintained.

Type
Paper
Copyright
Copyright © Cambridge University Press2008

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