Fuzzy Rees congruences on semigroups
The paper deals with fuzzy congruences determined by fuzzy ideals of a semigroup [cf. \textit{D.~H. Hong, H.~K.~Kim, J.~Y.~Kim}, Kyungpook Math. J. 35, No. 1, 105-112 (1995; Zbl 0839.20074)]. According to semigroup theory [cf. \textit{J.~M.~Howie}, An introduction to semigroup theory, Acad. Press, London (1976; Zbl 0355.20056)] these relations are called fuzzy Rees congruences. The author examines properties of semigroups which have only fuzzy Rees congruences.
scientific article; zbMATH DE number 1339544