As a branch of number theory, the theory of binary quadratic forms has a long history.
作为数论的一个分支，二元二次型理论有着悠久的历史。
It is very important to prove a lemma for the proof of the independence between two quadratic forms of multivariate normal variables.
对于多元正态随机变量二次型的独立性的证明，最重要的是证明一个引理。
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。
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