ON RELATIVE GI-INJECTIVE, GF-PROJECTIVE AND GI-FLAT MODULES
ON RELATIVE GI-INJECTIVE, GF-PROJECTIVE AND GI-FLAT MODULES
Let R be a ring, n a fixed non-negative integer and GI n (GF n , respectively) the class of all left R-modules of Gorenstein injective(Gorenstein flat, respectively) dimension at most n.It is shown that a left R-module M over any ring R is n-GI-injective if and only if it …