一般拓扑学基础 张德学 《一般拓扑学基础》 · 第 8 页 · Example 0.7 The objects of \(\mathbf{Top}_*\) are pairs \((X,x_0)\), where \(X\) is a topological space and \(x_0\) is a point of \(X\); \(x_0\) is called the basepoint of \((X,x_0)\). 查看原书页面
