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In particular, by considering certain conditions on the equivalence relation [Formula: see text], we obtain two related [Formula: see text]-groups and we prove some results in this respect. <\/jats:p>","DOI":"10.1142\/s1793830917500446","type":"journal-article","created":{"date-parts":[[2017,6,19]],"date-time":"2017-06-19T11:09:27Z","timestamp":1497870567000},"page":"1750044","source":"Crossref","is-referenced-by-count":3,"title":["A novel connection between rough sets, hypergraphs and hypergroups"],"prefix":"10.1142","volume":"09","author":[{"given":"Tita Khalis","family":"Maryati","sequence":"first","affiliation":[{"name":"Department of Mathematics Education, State Islamic University (UIN) Syarif Hidayatullah Jakarta, Jakarta, Indonesia"}]},{"given":"Bijan","family":"Davvaz","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Yazd University, Yazd, Iran"}]}],"member":"219","published-online":{"date-parts":[[2017,8,16]]},"reference":[{"key":"S1793830917500446BIB001","volume-title":"Graphes et Hypergraphes","author":"Berge C.","year":"1970"},{"key":"S1793830917500446BIB002","volume-title":"Hypergraphes","author":"Berge C.","year":"1989"},{"key":"S1793830917500446BIB003","volume-title":"Prolegomena of Hypergroup Theory","author":"Corsini P.","year":"1993"},{"key":"S1793830917500446BIB004","doi-asserted-by":"publisher","DOI":"10.1007\/BF01243594"},{"key":"S1793830917500446BIB005","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4757-3714-1"},{"key":"S1793830917500446BIB006","first-page":"565","volume":"14","author":"Corsini P.","year":"2008","journal-title":"J. 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