通用规则
- 空格会被忽略,添加空格有助于读者理解,需要显示时用
\quad
- 特殊标识或对象以
\
开头 - 多个变量放在一组:
{放在}_{一组}
, ${放在}_{一组}$ - 行内函数
$f(x)$
, 行内函数$f(x)$ -
跨行函数
\[f(x)\]$$f(x)$$
跨行函数
- multiple lines
1
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3
4
5
6b = \begin{cases} b_1, & \text{if}\ b_1 > 0 \ b_2, & \text{if}\ b_2 > 0 \ \frac{b_1 + b_2}{2} & \text{otherwise} \end{cases}
\(b = \begin{cases} b_1, & \text{if}\ b_1 > 0 \\ b_2, & \text{if}\ b_2 > 0 \\ \frac{b_1 + b_2}{2} & \text{otherwise} \end{cases}\)
示例
LaTex Syntax | Sample | Description |
---|---|---|
a \quad b |
\(a \quad b\) | quad space |
a \qquad b |
\(a \qquad b\) | double quad space |
x_i |
\(x_i\) | subscript |
\text{text value} |
\(\text{text value}\) | text |
e^{i\pi} |
\(e^{i\pi}\) | upperscript |
x_i^2 |
\(x_i^2\) | subscript and upperscript |
\sqrt{2} |
\(\sqrt{2}\) | square root |
\frac{1}{2} |
\(\frac{1}{2}\) | fraction |
\textstyle \sum_{i=1}^n w_ix_i |
\(\textstyle \sum_{i=1}^n w_ix_i\) | sum |
\displaystyle \sum_{i=1}^n w_ix_i |
\(\displaystyle \sum_{i=1}^n w_ix_i\) | sum |
\because |
\(\because\) | because |
\therefore |
\(\therefore\) | therefore |
= |
\(=\) | equal to |
> |
\(>\) | great than |
< |
\(<\) | less than |
\geqslant |
\(\geqslant\) | great than and equal to |
\leqslant |
\(\leqslant\) | less than and equal to |
\geq |
\(\geq\) | great than and equal to |
\leq |
\(\leq\) | less than and equal to |
\neq |
\(\neq\) | not equal to |
\lVert w \rVert |
\(\lVert w \rVert\) | vertical |
\langle x, y \rangle |
\(\langle x, y \rangle\) | angle |
\underset{a}{max} |
\(\underset{a}{max}\) | under set |
\bar{\gamma} |
\(\bar{\gamma}\) | bar |
A \cdot B |
\(A \cdot B\) | center dot |
A \cdots B |
\(A \cdots B\) | center dots |
\infty |
\(\infty\) | infinity |
- absolute value
\left|x\right|
\(\left|x\right|\)
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