منابع مشابه
Bitopology and Four-valued Logic
Bilattices and d-frames are two different kinds of structures with a four-valued interpretation. Whereas d-frames were introduced with their topological semantics in mind, the theory of bilattices has a closer connection with logic. We consider a common generalisation of both structures and show that this not only still has a clear bitopological semantics, but that it also preserves most of the...
متن کاملOn the number of monotonic functions from two-valued logic to k-valued logic
The problem of number determination of monotonic functions of n variables-i^(n) was formulated and solved for n = 4 by Dedekind [3] in 1897. For n = 5 and n = 6, this problem was solved in Church [2] and in Ward [12] respectively. The further authors bringing the essential improvement of the estimates of \j/(n) were Gilbert [4], Korobkov [8, 9, 10], Hansel [5], and Kleitman [7] who gave an asym...
متن کاملTwo-Valued Logic Programs
We define a nonmonotonic formalism that shares some features with three other systems of nonmonotonic reasoning—default logic, logic programming with strong negation, and nonmonotonic causal logic—and study its possibilities as a language for describing actions. 1998 ACM Subject Classification D.1.6 Logic Programming
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It is generally accepted that knowledge based systems would be smarter and more robust if they can manage inconsistent, incomplete or imprecise knowledge. This paper is about a four-valued fuzzy propositional logic, which is the result of the combination of a four-valued logic and a fuzzy propositional logic. Besides the nice computational properties, the logic enables us also to deal both with...
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Reiter’s default logic suffers the triviality, that is, a single contradiction in the premise of a default theory leads to the only trivial extension which everything follows from. In this paper, we propose a default logic based on fourvalued semantics, which endows default logic with the ability of handling inconsistency without leading to triviality. We define four-valued models for default t...
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ژورنال
عنوان ژورنال: Banach Center Publications
سال: 1993
ISSN: 0137-6934,1730-6299
DOI: 10.4064/-28-1-9-16