... 正规开拓:normal extension 正规基定理:normal basis theorem 正规化向量:normalized vector ...
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This paper has given a pithy analytic Proof of "principal diameter circle"Theorem. And on the basis of the thought of the theorem. We obtain two theorem about ellipse normal.
本文对主经圆定理给出了一个简练的解析证明,并且在此定理的思想基础上,得到了椭圆上法线的两个性质定理。
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