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WolframAlpha认为逆矩阵不是矩阵

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hbghlyj posted 2024-4-9 16:18 |Read mode

PositiveDefiniteMatrixQ[Inverse[{{2,1,1},{1,2,1},{1,1,2}}]]
输出：$\left(\begin{array}{lll}
2 & 1 & 1 \\
1 & 2 & 1 \\
1 & 1 & 2
\end{array}\right)^{-1}$ is not a matrix

Screenshot 2024-04-09 at 09-17-45 PositiveDefiniteMatrixQ Inverse {{2 1 1} {1 2 .png

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original poster hbghlyj posted 2024-4-9 16:19

PositiveDefiniteMatrixQ[Inverse[{{2, 1, 1}, {1, 2, 1}, {1, 1, 2}}]]
True

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