INTERVAL VALUED FUZZY (1, 2)-IDEALS IN SEMIGROUPS
In this paper we define interval valued fuzzy (1, 2)-ideals in semigroups. We investigate some properties and relationships of interval valued fuzzy (1, 2)-ideals and types of interval valued fuzzy ideals in semigroups. In regular semigroups the interval valued fuzzy (1, 2)-ideals and the interval valued fuzzy bi-ideals coincide.
interval valued fuzzy bi-ideal, interval valued fuzzy (1, 2)-ideals, regular semigroup.