Fussy Set Theory Definition A fuzzy subset A of a universe of discourse U is characterized by a membership function which associate with each element.

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Presentation transcript:

Fussy Set Theory Definition A fuzzy subset A of a universe of discourse U is characterized by a membership function which associate with each element u of U a number in the interval [0,1].

Definition Let U be the universe of discourse, A and B be two fussy subsets of U, and be the complement of A relative to U. Also, let u be an element of U. Then,

Figure 1. Fuzzy document sets for the query. Each is a conjunctive component. is the query fuzzy set.

Where is the membership of in the fuzzy set associated with.