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Fuzzifying Bi-Ideals of Semigroups and Implication OperatorsKeywords: (α , β)-fuzzy bi-ideal , fuzzifying bi-ideal , implication-based fuzzy bi-ideal. Abstract: In this paper the notion of (α,β)-fuzzy bi-ideal of a semigroup is introduced and related properties are investigated. Also, the definition of implication operator in the Lukasiewicz system of continuous-valued logic for fuzzy bi-ideals is considered. In particular, the relationship between fuzzy bi-ideals with thresholds and implication-based fuzzy bi-ideals is analyzed.
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