This type of differentiation is commonly used in classical differential geometry .
这种类型的分化，是常用的古典微分几何。
We can also see the variational method plays an important role in classical differential geometry.
我们可以看到变分法在经典微分几何中的重要作用。
In the classical differential geometry which deals with the theory of curves and surfaces of three dimensional Euclidean space, the most distinctive study is the Weingarten surface.
经典微分几何研究三维欧氏空间中曲线曲面理论，其最具有特色的研究是主曲率函数满足某些关系的魏因加吞曲面。
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