covering homotopy theorem

例句：

1. 1.The covering homotopy theorem is a fundamental concept in topology.
   覆盖同调定理是拓扑学中的一个基本概念。
2. 2. The covering homotopy theorem has been used to prove many important results in mathematics.
   覆盖同调定理已被用来证明数学中的许多重要结果。
3. 3. In this paper, we will discuss the application of the covering homotopy theorem in differential equations.
   在本文中，我们将讨论覆盖同调定理在微分方程中的应用。