A fuzzy function is a generalization of the concept of a classical function. A classical function f is a mapping (correspondence) from the domain D of definition of the function into a space S; f(D) ⊆ S is called the range of f. Different features of the classical concept of a function can be considered to be fuzzy rather than crisp. Therefore different “degrees” of fuzzification of the classical notion of a function are conceivable.
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