A reflection on what is a membership function
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Autores: Enric Trillas
, Claudi Alsina Català
- Localización: Mathware & soft computing: The Magazine of the European Society for Fuzzy Logic and Technology, ISSN-e 1134-5632, Vol. 6, Nº. 2-3, 1999, págs. 201-215
- Idioma: inglés
- Títulos paralelos:
- Una reflexión sobre qué es una función de pertenencia
- Enlaces
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Resumen
This paper is just a first approach to the idea that the membership function µP of a fuzzy set labelled P is, basically, a measure on the set of linguistic expressions x is P for each x in the corresponding universe of discourse X. Estimating that the meaning of P (relatively to X) is nothing else than the use of P on X, these measures seem to be reached by generalizing to a preordered set the concept of Fuzzy Measure, introduced by M. Sugeno, when the preorder translates the primary use of the predicate P, that is a basic relationship like x is less P than y. The paper only deals with predicates whose use is made by means of numerical characteristics, but those cases on which the characteristics (if they exist) are not of a numerical nature are not considered. By generalizing DeLuca-Termini's sharpened order some typical membership functions are studied as measures.
