@article{Hypersemigroups and Fuzzy Hypersemigroups_2017, place={Maryland, USA}, volume={10}, url={https://www.ejpam.com/index.php/ejpam/article/view/3049}, abstractNote={The aim is to show that the theory of hypersemigroups and the theory of fuzzy hypersemigroups are parallel to each other, in the following sense: An hypersemigroup$H$ is intra-regular, for example, if and only if $A\cap B\subseteq B*A$ for every right ideal $A$ and every left ideal $B$ of $H$. And an hypersemigroup$H$ is intra-regular if and only if $f\wedge g\preceq g\circ f$ for every fuzzy right ideal $f$ and every fuzzy left ideal $g$ of $H$. An hypersemigroup$H$ is left quasi-regular if and only if $A\cap B\subseteq A*B$ for every ideal $A$ and every nonempty subset $B$ of $H$. And an hypersemigroup$H$ is left quasi-regular if and only if $f\wedge g\preceq f\circ g$ for every fuzzy ideal $f$ and every fuzzy subset $g$ of $H$.}, number={5}, journal={European Journal of Pure and Applied Mathematics}, year={2017}, month={Nov.}, pages={929–945} }