“…It is clear that S(x, y) x ∧ y and S(x, 0) = 0 = S(0, x) for all x, y ∈ [0, 1], where x ∧ y = min(x, y) (see [1,3,7]). We denote the class of all semicopulas by S. There are three important examples of semicopulas: M, and S L , where M(a, b) = a ∧ b, (a, b) = ab and S L (a, b) = (a + b − 1) ∨ 0 usually called the Łukasiewicz t-norm [7].…”