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用LaTex表达向量和矩阵
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用LaTex表达向量和矩阵
2021年1月31日 / 14次阅读MathJax
线性代数太重要了，本文记录如何在网页上用mathjax表达向量和矩阵。
\begin{bmatrix}
1 \\ 3 \\ 5 \end{bmatrix}
[135]
多个列向量就是matrix：
\begin{bmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \end{bmatrix}
[123456789]
上面用的都是{bmatrix}，还有其它的不同的“括号”：
\begin{pmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \end{pmatrix}
(123456789)
\begin{Bmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \end{Bmatrix}
{123456789}
\begin{vmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \end{vmatrix}
|123456789|
\begin{Vmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \end{Vmatrix}
‖123456789‖
下面是很大的矩阵的写法：
\begin {pmatrix}
1 & a_1 & a_1^2 & \cdots & a_1^n \\
1 & a_2 & a_2^2 & \cdots & a_2^n \\
\vdots & \vdots& \vdots & \ddots & \vdots \\
1 & a_m & a_m^2 & \cdots & a_m^n
\end {pmatrix}
(1a1a12⋯a1n1a2a22⋯a2n⋮⋮⋮⋱⋮1amam2⋯amn)
增广矩阵，augmented matrix：
\left [
\begin {array} {cc|c}
1&2&3\\
4&5&6
\end {array}
\right ]
[123456]
最后来个小矩阵 (abcd)
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