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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This paper studies the Schouten tensor on the locally conformally flat manifold, and gets some sufficient conditions for m to be the space of constant curvature, which improves the known results.