cohomology of a coproduct

例句：

1. 1. In mathematics, cohomology is a crucial concept in the study of topological spaces.
   在数学中，共形是研究拓扑空间的关键概念。
2. 2.The cohomology of a space can be used to determine its homology groups.
   一个空间的共形可以用来确定它的同伦群。
3. 3. Cohomology plays an important role in understanding the structure and properties of complex manifolds.
   共形在理解复流形的结构与性质中起着重要作用。