Fuzzy Relations :-
A fuzzy relation R is a mapping from Cartesian space X x Y to the interval [0, 1] where the strength of mapping is expressed by membership function of the relation µR(x, y).
Operations on Fuzzy Relations :-
Let R and S be two fuzzy relations on Cartesian space X x Y. Then the membership functions of the operations union, intersection, compliment and containment on these two fuzzy relations are as follows: