WIReDSpace

Welcome to WIReDSpace(Wits Institutional Repository on DSpace)

For queries relating to content and technical issues, please contact IR specialists via this email address : openscholarship.library@wits.ac.za, Tel: 011 717 4652 or 011 717 1954

 

Communities in WIReDSpace

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Now showing 1 - 5 of 18

Recent Submissions

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Tableaux and Decision Procedures for Many-Valued Modal Logics
(University of the Witwatersrand, Johannesburg, 2024) Axelrod, Guy Ross
The aim of this dissertation is to present results expanding on the work done by Melvin Fitting in [22] and [24]. In [22], Fitting introduces a framework of many-valued modal logics, where modal formulas are interpreted via generalized Kripke models in which both the propositional valuation and the accessibility relation take on values from some Heyting algebra of truth values. For a fixed arbitrary finite Heyting algebra, H, [24] presents a signed semantic tableau system that is sound and complete with respect to all H-frames. We go on to consider the many-valued generalizations of frame properties such as reflexivity and transitivity (as presented in [39]) and give parameterized tableau systems which are sound and complete with respect to classes of H-frames satisfying such properties. Further, a prefixed tableau system is introduced, which allows us to define an intuitive decision procedure deciding the logics of the above- mentioned H-frame classes, as well as logics of H-frames satisfying generalized symmetry properties, which cannot be captured by Fitting’s unprefixed systems. Further, they allow us to derive finite frame properties. Such a decision procedure has been implemented, and is available on GitHub.
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Praticas artisticas colaborativas para empurrar o ceu e respirar
KL Mallmann; Andreia Machado Oliveira; GF Andre
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Good practices Coproducing integrated climate environment and health services
Joy Shumake-Guillemot; Rosa von Borries; Diarmid Campbell-Lendrum; Juli Trtanj; Jonathan Abrahams; Peter Berry; S.C Bhan; Juan Castillo; Yolanda Clewlow; Sally Edwards; David Gikungu; Kenza Khomsi; Qi Yong Liu; Roche Mahon; Andreas Matzarakis; Marcella Ohira; Judy Omumbo; Kyu Rang Kim; Reija Ruuhela; Ben Ryder; Craig Sinclair; Medeleine Thomsom; Coleen Vogel
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A Delphi assessment of climate change risks in southern Africa in the 21st century
Robert Scholes; Kaera Coetzer; Rumbidzai Matsika; Bernard W.T. Coetzee; Yolandi-Mari Ernst; Anita Etale; Nzalalemba Kubanza; Khangelani Moyo; Bright Nkrumah; Francois Engelbrecht; Danny Simatele; Coleen Vogel