Peng Jiayin

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The concept of quasi-coincidence of a fuzzy point with a fuzzy set is extended to the concept of quasi-coincidence of a fuzzy interval value with an interval valued fuzzy set. By using this new idea, the notions of interval valued („¡, „¡ „­q)-fuzzy filters in lattice implication algebras which is a generalization of(More)
In this paper, by two relations belong to (∈) and quasi-coincidence ( q ) between fuzzy points and fuzzy sets, the notions of (α,β) -fuzzy filters, the level filters in effect algebras are introduced where α, β are any two of {∈,q,∈,νq,∈,∧,q} with α ≠∈∧q. Their(More)
The notion of intuitionsitic fuzzy ideal of BCH-algebras is introduced, several appropriate examples are provided, and their some properties are investigated. How to deal with the homomorphic image and inverse image of intuitionsitic fuzzy ideals are studied. The relations between a intuitionsitic fuzzy ideal of BCH-algebras and a intuitionsitic fuzzy ideal(More)
Applying soft sets to BCH-algebras, the concepts of soft BCH-ideals and idealistic soft BCH-algebras are introduced, and several examples are given. The intersection, union and “AND” operations of soft BCH-ideals and idealistic soft BCH-algebras are established. The relations between these soft BCH-ideal, idealis-tic soft BCH-algebra and(More)
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