-Fuzzy Version of Ideals, Interior Ideals, Quasi-Ideals, and Bi-Ideals

We introduced (,)-fuzzy ideals, (,)-fuzzy interior ideals, (,)-fuzzy quasi-ideals, and (,)-fuzzy bi-ideals of an ordered semigroup and studied them. When =0 and =1, we meet the ordinary fuzzy ones. This paper can be seen as a generalization of Kehayopulu and Tsingelis (2006), Kehayopulu and Tsingelis (2007), and Yao (2009).