... qui nay trong[4,5,6]. Trong [4] de tirn khoa toi tieu cua SO& quot;do quan h~ S=(U, F), chung ta chuyen dich SO& quot;do quan heSve so do quan h~S,Ia SO& quot;do co itthuoctfnh hon va ... ho'n.Trong so do quanhe chuyen dichnayviec timkh6a toi tieutro' nen don gianhon. Muc dich cua baibaonay la nghienciru mot so tinh chat cua sO& apos; do quan h~ chuyen dichSva mot so van ... thetranslation relation schemeSand some related problems.Tomt~t. Khoa dong vaitroquantrongtrong lythuyet thietkeC(J so dir lieuquanhe.Cac ket qui ve khoa da diroc nghien ciru kha nhieu,...