一般拓扑学基础 张德学 《一般拓扑学基础》 · 第 232 页 · Remark 5 From a homology theory \((H,\partial)\), one obtains an extraordinary homology theory by setting \(H'_n(X,A)=H_{n-1}(X,A)\); it need not satisfy the dimension axiom. 查看原书页面
