On -algebras.
In this note we show that a subtraction algebra is equivalent to an implicative -algebra, and a subtraction semigroup is a special case of a -semigroup.
In this paper we extend the concept of an -fuzzy (characteristic) left (resp. right) ideal of a ring to a semiring , and we show that each level left (resp. right) ideal of an -fuzzy left (resp. right) ideal of is characteristic iff is -fuzzy characteristic.
The fuzzification of (normal) -subalgebras is considered, and some related properties are investigated. A characterization of a fuzzy -algebra is given.
We study some properties of -fuzzy left (right) ideals of a semiring related to level left (right) ideals.
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