(λ,μ)-Fuzzy Version of Ideals, Interior Ideals, Quasi-Ideals, and Bi-Ideals

摘要

We introduced(λ,μ)-fuzzy ideals,(λ,μ)-fuzzy interior ideals,(λ,μ)-fuzzy quasi-ideals, and(λ,μ)-fuzzy bi-ideals of an ordered semigroup and studied them. Whenλ=0andμ=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).