This paper deals with a particular class of hyperstructures called semihypergroups, which is a generalization of semigroups. We introduce the notions of SU-qausi hyperideal, SU-bi-hyperideal, SU-generalized bi-hyperideal, SU-interior hyperideal and discuss several properties of these hyperideals. We also characterize regular and intra-regular semihypergroups by the properties of their SU-hyperideals.
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