通过引入Abelian范畴A中X-Gorenstein投射对象与Y-Gorenstein内射对象的定义,讨论这两类对象的同调性质,并研究与这两类对象有关的导出函子Ext(X-GP(A))^n(-,N)与Ext(Y-GI(A))^n(M,-)之间的关系.
Let A be an Abelian category. By introducing notions of E-Gorenstein projective objects and Y-Gorenstein injective objects, we discussed homological properties of those two kinds of objects, and investigated relationships between the derived funetor ExExt(X-GP(A))^n(-,N) and Ext(Y-GI(A))^n(M,-).