一般拓扑学基础 张德学 《一般拓扑学基础》 · 第 139 页 · Theorem 7.3 If \(K\) and \(L\) are simplicial complexes and \(f:|K|\to|L|\) is continuous, then for some \(q\ge1\) there is a simplicial approximation \(\varphi:\operatorname{Sd}^qK\to L\) to \(f\). 查看原书页面
