Fuzzy sets and non-complete 1-hypergroups.
Group and hypergroup operations induced by multivalued functions
Hyper BCI-algebras
We introduce the concept of a hyper BCI-algebra which is a generalization of a BCI-algebra, and investigate some related properties. Moreover we introduce a hyper BCI-ideal, weak hyper BCI-ideal, strong hyper BCI-ideal and reflexive hyper BCI-ideal in hyper BCI-algebras, and give some relations among these hyper BCI-ideals. Finally we discuss the relations between hyper BCI-algebras and hyper groups, and between hyper BCI-algebras and hyper -groups.
Hypergroups defined from a linear space
Hypergroups of type u on the right of size five. Part two
Hyperstructures Associated with Ordered sets
Induced representations and duality results for commutative hypergroups.
Intuitionistic fuzzy -ideals.
Intuitionistic hyperideals of semihypergroups.
Isomorphism theorems of polygroups.
Multistructures determined by differential rings
Note on isomorphism theorems of hyperrings.
On some representations of hypergroups
On the hypergroups with four proper pairs and without scalars
On the partial semi-hypergroups with empty diagonal
On the semi-sub-hypergroups of a hypergroup.
-hypergoupes
Partial Abelian H_u-Monoids
Rough semigroups and rough fuzzy semigroups based on fuzzy ideals
In this paper, we firstly introduce a special congruence relation U(μ, t) induced by a fuzzy ideal μ in a semigroup S. Then we define the lower and upper approximations based on a fuzzy ideal in semigroups. We can establish rough semigroups, rough ideals, rough prime ideals, rough fuzzy semigroups, rough fuzzy ideals and rough fuzzy prime ideals according to the definitions of rough sets and rough fuzzy sets. Furthermore, we shall consider the relationships among semigroups and rough semigroups,...
Several aspects on the hypergroups associated with -ary relations.