“quadratic form”的概念、定义、翻译、参考文献-科学参考

单词	quadratic form
释义	quadratic form Mathematics In one, two, and three variables, functions in quadratic form are: $\begin{array}{l} F (x) = a x^{2} \\ F (x, y) = a x^{2} + b y^{2} + c x y \\ F (x, y, z) = a x^{2} + b y^{2} + c z^{2} + d x y + e x z + f y z \end{array}$ Generally, if x is a column of n variables and A is an n × n matrix then x^TAx will be in quadratic form. A can be chosen to be symmetric. See form. Statistics See Matrix.
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