Gradual elements in a fuzzy set
- Publication Type:
- Journal Article
- Soft Computing, 2008, 12 (2), pp. 165 - 175
- Issue Date:
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The notion of a fuzzy set stems from considering sets where, in the words of Zadeh, the "transition from non-membership to membership is gradual rather than abrupt". This paper introduces a new concept in fuzzy set theory, that of a gradual element. It embodies the idea of fuzziness only, thus contributing to the distinction between fuzziness and imprecision. A gradual element is to an element of a set what a fuzzy set is to a set. A gradual element is as precise as an element, but the former is flexible while the latter is fixed. The gradual nature of an element may express the idea that the choice of this element depends on a parameter expressing some relevance or describing some concept. Applications of this notion to fuzzy cardinality, fuzzy interval analysis, fuzzy optimization, and defuzzification principles are outlined. © Springer-Verlag 2007.
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