Within differential geometry are the concepts of fiber bundles and calculus on manifolds, in particular, vector and tensor calculus.

微分几何包含这样的概念：纤维束和流形上的微积分，特别是矢量与张量微积分。

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In this paper the author using tensor calculus shows that the equation for induced normal curvature of Nankai University and that of Sakai (Japanese) are of unity.

本文作者利用张量计算，证明了南开大学的诱导法曲率公式与日本酒井公式是统一的，一致的。

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In this paper the author using tensor calculus shows that the equation for induced normal curvature of Nankai University and that of Sakai (Japanese) are of unity.

本文作者利用张量计算，证明了南开大学的诱导法曲率公式与日本酒井公式是统一的，一致的。

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