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$E=mc^2$

$H$

斜体

代码块

s

公式

$ \alpha_\beta = \gamma_\delta $

$\alpha \in A$

$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

$H_2O$

$$\begin{align} \nonumber \sqrt{37} &= \sqrt{\frac{73^2-1}{12^2}} \\ \nonumber &= \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\ \nonumber &= \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^2-1}{73^2}} \\ \nonumber &= \frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \\ \nonumber &\approx \frac{73}{12}\left(1 - \frac{1}{2\cdot73^2}\right) \end{align}$$ $$\mathbf{V}_1 \times \mathbf{V}_2 = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ \frac{\partial X}{\partial u} & \frac{\partial Y}{\partial u} & 0 \\ \frac{\partial X}{\partial v} & \frac{\partial Y}{\partial v} & 0 \\ \end{vmatrix}$$ $$f(X,Y) = \sum_{i} \sum_{j} x_iy_j$$

设$f(x,y) = Ke^{-(ax^2+2bxy+cy^2)}$，其中 $a>0,c>0,b^2-ac<0$。如果$f$是密度函数，那么$K=___$。

流程图

Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good,thanks!

graph LR
A[Hard edge] --> B[Round edge]
B --> C{Decision}
C --> |One| D[Result One]
C --> |Two| E[Result Two]
C --> F[Result Three]

st=>start: Start op=>operation: Your Operation cond=>condition: Yes or No? e=>end st->op->cond cond(yes)->e cond(no)->op{"scale":1,"line-width":2,"line-length":50,"text-margin":10,"font-size":12}