In this paper, we present a way to represent contradiction between fuzzy sets. This representation is given in terms of the notion of f -weak-contradiction. Unlike other approaches, we do not define contradiction just by using one of the relations of f -weak-contradiction but by considering the whole set of relations. This consideration avoids the need to fix an operator beforehand in order to take into account all the information between two fuzzy sets. As a result, we characterize the contradiction between fuzzy sets and define a family of measures of contradiction satisfying four interesting properties: symmetry; antitonicity; if the intersection is empty, then the measure is one; and if there is an element in the intersection with degree of membership 1, then the measure is zero.
Index Terms-Fuzzy sets, measure of contradiction, N-contradiction.1063-6706
Abstract. In this work we recall the first steps towards the definition of an answer set semantics for residuated logic programs with negation, and concentrate on the development of relationships between the notions of coherence and consistence of an interpretation.
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