Olaru, Horaţiu; Pelea, Cosmin; Purdea, Ioan On the completeness of the semihypergroups associated to binary relations. (English) Zbl 1151.20054 Stud. Univ. Babeș-Bolyai, Math. 52, No. 2, 73-85 (2007). Summary: We determine the complete hypergroupoids, semihypergroups or hypergroups determined by binary relations (more exactly, by monounary multialgebras) and we study some closure properties of their classes with respect to the products of some categories where they are contained. Cited in 2 Documents MSC: 20N20 Hypergroups 08A05 Structure theory of algebraic structures Keywords:semihypergroups associated to binary relations; semihypergroups associated to monounary multialgebras; complete semihypergroups; complete hypergroups PDFBibTeX XMLCite \textit{H. Olaru} et al., Stud. Univ. Babeș-Bolyai, Math. 52, No. 2, 73--85 (2007; Zbl 1151.20054)