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4Logics in Artificial Intelligence: European Workshop, Jelia '96, Evora, Portugal, September 30 - October 3, 1996, Proceedings (review)Springer Verlag. 1996.This book presents the refereed proceedings of the Sixth European Workshop on Logics in Artificial Intelligence, JELIA '96, held in Evora, Portugal in September/October 1996. The 25 revised full papers included together with three invited papers were selected from 57 submissions. Many relevant aspects of AI logics are addressed. The papers are organized in sections on automated reasoning, modal logics, applications, nonmonotonic reasoning, default logics, logic programming, temporal and spatial …Read more
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8A Relational Formalisation Of Arbitrary Finite Valued LogicsLogic Journal of the IGPL 6 (5): 755-774. 1998.A method of developing a relational semantics and relational proof systems for many-valued logics based on finite algebras of truth values is presented. The method is applied to Rosser-Turquette logic, logics based on symmetric Heyting algebras with operators and a Post-style logic
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3Logics in Artificial Intelligence: Proceedings of European Workshop, Jelia '96, Évora, Portugal, September 30-October 3, 1996 (edited book, review)Springer. 1996.
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42Relational proof systems for spatial reasoningJournal of Applied Non-Classical Logics 16 (3-4): 409-431. 2006.We present relational proof systems for the four groups of theories of spatial reasoning: contact relation algebras, Boolean algebras with a contact relation, lattice-based spatial theories, spatial theories based on a proximity relation
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Logic of vague conceptsBulletin of the Section of Logic 11 (3-4): 115-126. 1982.This paper contains a logic enabling us to reason in the presence of vague- ness phenomena. We consider an epistemological vagueness of concepts caused by the unavailability of total information about a continuous world which we describe in observational terms. Lack of information is manifested by the existence of borderline cases for concepts. Since we are unable to perceive concepts exactly, we cannot establish a sharp boundary between an extension of a concept and its complement. Some results…Read more
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Three aspects of verisimilitude. Part IIBulletin of the Section of Logic 16 (4): 140-147. 1987.In the following two sections we propose ordering relations for which the material for comparison of theories of concepts the theories deal with. The relations refer to what is called concept analysis. In the present section we introduce relations enabling us to compare theories from the point of view of the following aspect: How well the theories in question classify objects into positive and negative instances of concepts. Classifications of objects provided by a theory can be correct or incorr…Read more
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Three aspects of verisimilitude. Part IBulletin of the Section of Logic 16 (3): 96-103. 1987.One of the generalizations of R. W´ojcicki’s concept of referential matrix is so-called pseudo-referential matrix. G. Malinowski, who introduced that concept, also considers a particular case of pseudo-referential matrices called discrete pseudo-referential matrices. In this note we want to show how any generalized matrix determines a semantically equivalent discrete pseudo-referential matrix.
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Logic For Reasoning About KnowledgeBulletin of the Section of Logic 16 (1): 26-36. 1987.One of the important issues in research on knowledge based computer systems is development of methods for reasoning about knowledge. In the present paper semantics for knowledge operators is introduced. The underlying logic is developed with epistemic operators relative to indiscernibility. Facts about knowledge expressible in the logic are discussed, in particular common knowledge and joint knowledge of n group of agents. Some paradoxes of epistemic logic are shown to be eliminated in the given…Read more
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18Dynamic logic with program specifications and its relational proof systemJournal of Applied Non-Classical Logics 3 (2): 147-171. 1993.ABSTRACT Propositional dynamic logic with converse and test, is enriched with complement, intersection and relational operations of weakest prespecification and weakest postspecification. Relational deduction system for the logic is given based on its interpretation in the relational calculus. Relational interpretation of the operators ?repeat? and ?loop? is given
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6International Workshops of COST Action 274, TARSKI, 2002-2005, Selected Revised Papers Harrie de Swart. Dual residua of a lattice join were ... The dual residua of well— known t-conorms Definition 2. ([28], [29]) A double residuated lattice ...
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Three Aspects of Verisimilitude'Bulletin of the Section of Logic 16 (3): 96-106. 1987.One of the generalizations of R. W´ojcicki’s concept of referential matrix is so-called pseudo-referential matrix . G. Malinowski, who introduced that concept, also considers a particular case of pseudo-referential matrices called discrete pseudo-referential matrices . In this note we want to show how any generalized matrix determines a semantically equivalent discrete pseudo-referential matrix
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Interpretation of dynamic logic and its extensions in the relational calculusBulletin of the Section of Logic 18 132-137. 1989.
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27Logics of similarity and their dual tableaux. A surveyIn Giacomo Della Riccia, Didier Dubois & Hans-Joachim Lenz (eds.), Preferences and Similarities, Springer. pp. 129--159. 2008.We present several classes of logics for reasoning with information stored in information systems. The logics enable us to cope with the phenomena of incompleteness of information and uncertainty of knowledge derived from such an information. Relational inference systems for these logics are developed in the style of dual tableaux.
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28A hierarchy of modal logics with relative accessibility relationsJournal of Applied Non-Classical Logics 9 (2-3): 303-328. 1999.ABSTRACT In this paper we introduce and investigate various classes of multimodal logics based on frames with relative accessibility relations. We discuss their applicability to representation and analysis of incomplete information. We provide axiom systems for these logics and we prove their completeness
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1Relational interpretation of modal logicsBulletin of the Section of Logic 17 (1): 2-10. 1988.The purpose of the present paper is to show that modal propositional logics can be interpreted in a logic based on relational calculus. We consider languages with necessity operators [R], where R is an accessibility relation expression representing an element of the algebra of binary relations with operations −,∪,∩, −1 , ◦. The relational logic is based on relational calculus enriched by operations of weakest prespecification and weakest postspecification introduced in Hoare and He Jifeng and inve…Read more
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34Modal Logics in the Theory of Information SystemsMathematical Logic Quarterly 30 (13-16): 213-222. 1984.
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47Dual Tableaux: Foundations, Methodology, Case StudiesSpringer. 2011.The book presents logical foundations of dual tableaux together with a number of their applications both to logics traditionally dealt with in mathematics and philosophy (such as modal, intuitionistic, relevant, and many-valued logics) and to various applied theories of computational logic (such as temporal reasoning, spatial reasoning, fuzzy-set-based reasoning, rough-set-based reasoning, order-of magnitude reasoning, reasoning about programs, threshold logics, logics of conditional decisions).…Read more
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64A discrete duality between apartness algebras and apartness framesJournal of Applied Non-Classical Logics 18 (2-3): 213-227. 2008.Apartness spaces were introduced as a constructive counterpart to proximity spaces which, in turn, aimed to model the concept of nearness of sets in a metric or topological environment. In this paper we introduce apartness algebras and apartness frames intended to be abstract counterparts to the apartness spaces of (Bridges et al., 2003), and we prove a discrete duality for them.
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1Interpretation of relevant logics in a logic of ternary relationsBulletin of the Section of Logic 19 (No2): 39-49. 1990.
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50Relational dual tableaux for interval temporal logicsJournal of Applied Non-Classical Logics 16 (3-4). 2006.Interval temporal logics provide both an insight into a nature of time and a framework for temporal reasoning in various areas of computer science. In this paper we present sound and complete relational proof systems in the style of dual tableaux for relational logics associated with modal logics of temporal intervals and we prove that the systems enable us to verify validity and entailment of these temporal logics. We show how to incorporate in the systems various relations between intervals an…Read more
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Relational logics for formalization of database dependenciesBulletin of the Section of Logic 27. 1998.
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49Relational proof system for relevant logicsJournal of Symbolic Logic 57 (4): 1425-1440. 1992.A method is presented for constructing natural deduction-style systems for propositional relevant logics. The method consists in first translating formulas of relevant logics into ternary relations, and then defining deduction rules for a corresponding logic of ternary relations. Proof systems of that form are given for various relevant logics. A class of algebras of ternary relations is introduced that provides a relation-algebraic semantics for relevant logics
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29Duality via Truth: Semantic frameworks for lattice-based logicsLogic Journal of the IGPL 13 (4): 467-490. 2005.A method of defining semantics of logics based on not necessarily distributive lattices is presented. The key elements of the method are representation theorems for lattices and duality between classes of lattices and classes of some relational systems . We suggest a type of duality referred to as a duality via truth which leads to Kripke-style semantics and three-valued semantics in the style of Allwein-Dunn. We develop two new representation theorems for lattices which, together with the exist…Read more
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38Equational Reasoning in Non-Classical LogicsJournal of Applied Non-Classical Logics 8 (1-2): 27-66. 1998.ABSTRACT In this paper it is shown that a broad class of propositional logics can be interpreted in an equational logic based on fork algebras. This interpetability enables us to develop a fork-algebraic formalization of these logics and, as a consequence, to simulate non-classical means of reasoning with equational theories algebras
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