
doi: 10.1007/bf02844485
A significant result in the hypergroup theory is the one given by D. Freni in 1991, that is that in a hypergroup \(\beta=\beta^*\). The aim of the paper under review is to characterize semihypergroups in which the relation \(\beta\) is transitive. The main theorem gives a necessary and sufficient condition such that \(\beta\) is transitive. As a corollary of this theorem the transitivity of \(\beta\) in hypergroups is proved again.
hypergroups, semihypergroups, Hypergroups, transitivity of \(\beta\)
hypergroups, semihypergroups, Hypergroups, transitivity of \(\beta\)
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