On the Operation ∆ over Intuitionistic Fuzzy Sets

Recently, the new operation ∆ was introduced over intuitionistic fuzzy sets and some of its properties were studied. Here, additional this operations are formulated checked, providing an analogue to De Morgan’s Law (Theorem 1), Fixed Point Theorem 2), connections between on one hand classical modal operators IFS Necessity Possibility, other (Theorems 3 4). It is shown that it can be used for a de-i-fuzzification. A geometrical interpretation process constructing operator given.