名词
中文翻译：同伦类
同义词：
['cohomology class', 'cohomology class', 'cohomology class']
例句：
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1. In mathematics, the cohomology class of a space is defined as the set of all classes of vector fields that are tangent to it.
在数学中，一个空间的共形类被定义为所有与它相切的向量场类的集合。
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2. The cohomology class of the space is important in studying its topology.
这个空间的共形类在研究它的拓扑学中很重要。
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3. The cohomology class of a manifold is related to its topology and its dimensions.
一个流形的共形类与其拓扑和维度有关。