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Main Authors: Niki, Satoru, Omori, Hitoshi
Format: Preprint
Published: 2024
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Online Access:https://arxiv.org/abs/2501.00495
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author Niki, Satoru
Omori, Hitoshi
author_facet Niki, Satoru
Omori, Hitoshi
contents It is not uncommon for a logic to be invented multiple times, hinting at its robustness. This trend is followed also by the expansion BD+ of Belnap-Dunn logic by Boolean negation. Ending up in the same logic, however, does not mean that the semantic interpretations are always the same as well. In particular, different interpretations can bring us to different logics, once the basic setting is moved from a classical one to an intuitionistic one. For BD+, two such paths seem to have been taken; one (BDi) by N. Kamide along the so-called American plan, and another (HYPE) by G. Moisil and H. Leitgeb along the so-called Australian plan. The aim of this paper is to better understand this divergence. This task is approached mainly by (i) formulating a semantics for first-order BD+ that provides an Australian view of the system; (ii) showing connections of the less explored (first-order) BDi with neighbouring systems, including an intermediate logic and variants of Nelson's logics.
format Preprint
id arxiv_https___arxiv_org_abs_2501_00495
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle Kamide is in America, Moisil and Leitgeb are in Australia
Niki, Satoru
Omori, Hitoshi
Logic in Computer Science
It is not uncommon for a logic to be invented multiple times, hinting at its robustness. This trend is followed also by the expansion BD+ of Belnap-Dunn logic by Boolean negation. Ending up in the same logic, however, does not mean that the semantic interpretations are always the same as well. In particular, different interpretations can bring us to different logics, once the basic setting is moved from a classical one to an intuitionistic one. For BD+, two such paths seem to have been taken; one (BDi) by N. Kamide along the so-called American plan, and another (HYPE) by G. Moisil and H. Leitgeb along the so-called Australian plan. The aim of this paper is to better understand this divergence. This task is approached mainly by (i) formulating a semantics for first-order BD+ that provides an Australian view of the system; (ii) showing connections of the less explored (first-order) BDi with neighbouring systems, including an intermediate logic and variants of Nelson's logics.
title Kamide is in America, Moisil and Leitgeb are in Australia
topic Logic in Computer Science
url https://arxiv.org/abs/2501.00495