00975nam a2200277 i 450099100126874970753620020507190332.0930918s1992 it ||| | eng 8877720255b10823992-39ule_instLE01309637ExLDip.to Matematicaeng512.2AMS 20NAMS 20N20Corsini, Piergiulio536570Prolegomena of hypergroup theory :supplemento alla Rivista di matematica pura ed applicata /Piergiulio CorsiniUdine :Aviani editore,1992213 p. ;cm 24Hypergroups.b1082399221-09-0628-06-02991001268749707536LE013 20N COR11 (1992)12013000106182le013-E0.00-no 16660.i1093164828-06-02Prolegomena of hypergroup theory924253UNISALENTOle01301-01-93ma -engit 01