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    STUDIA MATHEMATICA - Issue no. 2 / 2007  
         
  Article:   ON THE COMPLETENESS OF THE SEMIHYPERGROUPS ASSOCIATED TO BINARY RELATIONS.

Authors:  HORAŢIU OLARU, COSMIN PELEA, IOAN PURDEA.
 
       
         
  Abstract:  We will determine the complete hypergroupoids, semihypergroups or hypergroups determined by binary relations (more exacly, by monounary multialgebras) an we will study some closure properties of their classes with respect to the products of some categories where they are contained.  
         
     
         
         
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