The paper teus a direct way to select nonsingular linear transformation by changing two special quadratic forms without square terms to the standard form.
本文给出了化不含平方项的两类特殊二次型为标准形的一种直接选取满秩线性变换法。
The specular reflection is a very important linear transformation in Euclidean space, and it has a special geometrical explanation in geometrical space.
镜面反射是欧氏空间中一类很重要的线性变换，在几何空间中有着极其形象的解释。
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