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Paper   IPM / M / 7407
School of Mathematics
  Title:   Semihypergroups and S-hypersystems
1.  B. Davvaz
2.  N. S. Poursalavati
  Status:   Published
  Journal: Pure Math. Appl.
  No.:  1
  Vol.:  11
  Year:  2000
  Pages:   43-49
  Supported by:  IPM
In this paper some properties of semihypergroups are studied. In particular, if β is the fundamental relation on a semihypergroup, then the notion of β-closed subsets is defined and some theorems are obtained.

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