HESITANT FUZZY BI-IDEALS IN SEMIGROUPS JUN, YOUNG BAE; LEE, KYOUNG JA; SONG, SEOK-ZUN;
Characterizations of hesitant fuzzy left (right) ideals are considered. The notion of hesitant fuzzy (generalized) bi-ideals is introduced, and related properties are investigated. Relations between hesitant fuzzy generalized bi-ideals and hesitant fuzzy semigroups are discussed, and characterizations of (hesitant fuzzy) generalized bi-ideals and hesitant fuzzy bi-ideals are considered. Given a hesitant fuzzy set on a semigroup S, hesitant fuzzy (generalized) bi-ideals generated by are established.