ISSN : 1226-0657
As a generalization of fuzzy subsemigroups, the notion of <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroups is introduced, and several properties are investigated. A condition for an <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup to be a fuzzy subsemigroup is considered. Characterizations of <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroups are established, and we show that the intersection of two <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroups is also an <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup. A condition for an <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup to be <TEX>${\varepsilon}$</TEX>-fuzzy idempotent is discussed. Using a given <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup, a new <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup is constructed. Finally, the fuzzy extension of an <TEX>${\varepsilon}$</TEX>-generalized fuzzy subsemigroup is considered.
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