... ngir nghia giira cac gia tri ngonngir trong X cling nhir giira cac gia trr. Qui tree ket qua tac dong cua toan tli- hELH len gia trjxEXlahxthayVIh(x).Nhtr v~y, mot gia tri ngon ngir ... tathira nhanrKng gia tri chanlyngon ngir cuamoicong thirc noichungkhongduynhat, chungco thenhan nhieu gia trikhacnhau mienla cac gia tridodeu Ionhonhay behen gia tritrunghoaW.Chang ... chuyen gia tutrong [7,8].VIvay chung ta se m60 rong cac qui titc chuyen gia tutrong [7,8] vadirara mot so quititc suy dien moi nhir thay the gia tu- dong mire, phan ti 1~,nharn giai quyet...