QSSS
6.3正定二次型
\(顺序主子式 = n阶对称矩阵A 有\{ a_{11}>0,\begin{bmatrix} a_{11} & a_{12} \\ a_{21} & a_{22} \end{bmatrix}>0\dots |A| >0 \} \implies 对称矩阵A正定\) ⚠️upload failed, check dev console
\(顺序主子式 = n阶对称矩阵A 有\{ a_{11}>0,\begin{bmatrix} a_{11} & a_{12} \\ a_{21} & a_{22} \end{bmatrix}>0\dots |A| >0 \} \implies 对称矩阵A正定\) ⚠️upload failed, check dev console