“…The notion of fuzzy subgroup was introduced by A. Rosenfeld et.al [5], [10] in his pioneering paper. Many authors [2], [3], [6], [7], [8] applied the concept of fuzzy sets for studies in fuzzy semigroups, fuzzy groups, fuzzy rings, fuzzy ideals, fuzzy semirings and fuzzy near-rings and so on. In fact many basic properties in group theory are found to be carried over to fuzzy groups.…”
In this paper, fuzzy subgroups on direct product of groups over a t-norm has been discussed. By using a t-norm T, we characterize some basic properties of T -fuzzy direct product of groups and normal T -fuzzy direct product of groups. Also we define the concept normal subgroups between T -fuzzy direct product of groups and prove some basic properties.
“…The notion of fuzzy subgroup was introduced by A. Rosenfeld et.al [5], [10] in his pioneering paper. Many authors [2], [3], [6], [7], [8] applied the concept of fuzzy sets for studies in fuzzy semigroups, fuzzy groups, fuzzy rings, fuzzy ideals, fuzzy semirings and fuzzy near-rings and so on. In fact many basic properties in group theory are found to be carried over to fuzzy groups.…”
In this paper, fuzzy subgroups on direct product of groups over a t-norm has been discussed. By using a t-norm T, we characterize some basic properties of T -fuzzy direct product of groups and normal T -fuzzy direct product of groups. Also we define the concept normal subgroups between T -fuzzy direct product of groups and prove some basic properties.
“…The ideal of fuzzy subsemigroup was also introduced by Kuroki [7], [9]. In [8], Kuroki characterized several classes of semigroups in terms of fuzzy left, fuzzy right and fuzzy bi-ideals. Xie [12] introduced the idea of extensions of fuzzy ideals in semigroups.…”
In this paper we shows that in ordered groupoids the Q-fuzzy right (resp. Q-fuzzy left) ideals are Q-fuzzy quasi-ideals, in ordered semigroups the Q-fuzzy quasi-ideals are Q-fuzzy bi-ideals, and in regular ordered semigroups the Q-fuzzy quasi-ideals and the Q-fuzzy bi-ideals coincide and show that if S is an ordered semigroup, then a Q-fuzzy subset f is a Q-fuzzy quasi-ideal of S if and only if there exist a Q-fuzzy right ideal g and a Q-fuzzy left ideal h of S such that f = g ∩ h.
“…Since then, many scholars have been engaged in the fuzzification of some algebraic structures. Kuruki [3,4] initiated the theory of fuzzy semigroups, and introduced the concepts of fuzzy ideal and fuzzy bi-ideal. A systemtic exposition of fuzzy semigroup by Mordeson et al appeared in [5] , where one can find the theoretical results of fuzzy semigroup and their use in fuzzy coding, fuzzy finite state machines and fuzzy languages.…”
Abstract:The concepts of (λ , µ)−fuzzy subsemigroup and various (λ , µ)−fuzzy ideals of a semigroup were introduced by generalizing (∈, ∈∨q)−fuzzy subsemigroup and (∈, ∈∨q)−fuzzy ideal. The regular semigroup was characterized by the properties of the middle parts of various (λ , µ)−fuzzy ideals, and several equivalence conditions of regular semigroups were obtained.
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