一文学会在Markdown中编辑数学符号与公式

数学识别软件

$$\begin{pmatrix}1.2 & 2 \\ 3 &4\\ \end{pmatrix}$$
$$\begin{bmatrix}1 & 2 \\ 3 & 4\\ \end{bmatrix}$$
$$\begin{Bmatrix}1 &2 \\ 3 & 4\\ \end{Bmatrix}$$
$$\begin{vmatrix}1 &2 \\ 3 &4\\ \end{vmatrix}$$
$$\begin{Vmatrix}1 & 2 \\ 3 & 4\\ \end{Vmatrix}$$
$$\begin{pmatrix}1 & 2 \\ 3 &4\\ \end{pmatrix}$$
$$\begin{bmatrix}1 & 2 \\ 3 & 4\\ \end{bmatrix}$$
$$\begin{Bmatrix}1 &2 \\ 3 & 4\\ \end{Bmatrix}$$
$$\begin{vmatrix}1 &2 \\ 3 &4\\ \end{vmatrix}$$
$$\begin{Vmatrix}1 & 2 \\ 3 & 4\\ \end{Vmatrix}$$
$$\begin{pmatrix}1&a_1&a_1^2&\cdots&a_1^n\\1&a_2&a_2^2&\cdots&a_2^n\\\vdots&\vdots&\vdots&\ddots&\vdots\\1&a_m&a_m^2&\cdots&a_m^n\\\end{pmatrix}$$

系统状态方程 $\dot{x}=Ax$ 的解为
$x=e^Ax(0)$

$0.98^{365} \approx 0.0006$
$$1.02^{365} \approx 1377.4$$
$$\begin{align} v + w & = 0 & \text{Given} \tag{1.xx} \\ -w & = -w + 0 & \text{additive identity} \tag{1.xx} \\ -w + 0 & = -w + (v + w) & \text{equations $(1)$ and $(2)$} \ \end{align}$$

$$\begin{align} \sqrt{37} & = \sqrt{\frac{73^2-1}{12^2}} \\ & = \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\ & = \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^2-1}{73^2}} \\ & = \frac{73}{12}\sqrt{1-\frac{1}{73^2}} \\ & \approx \frac{73}{12}\left(1-\frac{1}{2\cdot73^2}\right) \\ \end{align}$$