Markdown公式(二)
参考资料https://gavin_nicholas.coding.me/archives/
1. 如何输入括号和分隔符
()
、 []
和 |
表示自己, {}
表示 {}
。当要显示大号的括号或分隔符时,要用 \left
和 \right
命令。
例子:$$f(x,y,z) = 3y^2z \left( 3+\frac{7x+5}{1+y^2} \right)$$
,显示:
\[f(x,y,z) = 3y^2z \left( 3+\frac{7x+5}{1+y^2} \right)
\]
有时候要用\left.
或\right.
进行匹配而不显示本身。
例子:$$\left. \frac{ {\rm d}u}{ {\rm d}x} \right| _{x=0}$$
,显示:
\[\left. \frac{ {\rm d}u}{ {\rm d}x} \right| _{x=0}
\]
1.1 偏导
$$\frac{\partial^{2}y}{\partial x^{2}}$$
\[\frac{\partial^{2}y}{\partial x^{2}}
\]
2. 运算符:
关系运算符 | markdown语言 | 集合运算符 | markdown语言 |
---|---|---|---|
\(\pm\) | $\pm$ |
\(\emptyset\) | $\emptyset$ |
\(\times\) | $\times$ |
\(\in\) | $\in$ |
\(\div\) | $\div$ |
\(\notin\) | $\notin$ |
\(\mid\) | $\mid$ |
\(\subset\) | $\subset$ |
\(\nmid\) | $\nmid$ |
\(\supset\) | $\supset$ |
\(\cdot\) | $\cdot$ |
\(\subseteq\) | $\subseteq$ |
\(\circ\) | $\circ$ |
\(\supseteq\) | $\supseteq$ |
\(\ast\) | $\ast$ |
\(\bigcap\) | $\bigcap$ |
\(\bigodot\) | $\bigodot$ |
\(\bigcup\) | $\bigcup$ |
\(\bigotimes\) | $\bigotimes$ |
\(\bigvee\) | $\bigvee$ |
\(\bigoplus\) | $\bigoplus$ |
\(\bigvee\) | $\bigvee$ |
\(\leq\) | $\leq$ |
\(\bigwedge\) | $\bigwedge$ |
\(\geq\) | $\geq$ |
\(\biguplus\) | $\biguplus$ |
\(\neq\) | $\neq$ |
\(\bigsqcup\) | $\bigsqcup$ |
\(\approx\) | $\approx$ |
||
\(\equiv\) | $\equiv$ |
\(\ll\) | $\ll$ |
\(\sum\) | $\sum$ |
||
\(\prod\) | $\prod$ |
\(\sim\) | $\sim$ |
\(\coprod\) | $\coprod$ |
\(\backsim\) | $\backsim$ |
\(\prec\) \(\preceq\) \(\succ\) \(\succeq\) | $\prec$ $\preceq$ $\succ$ $\succeq$ |
对数运算符 | markdown语言 | 戴帽符号 | markdown语言 | 连线符号 | markdown语言 |
---|---|---|---|---|---|
\(\log\) | $\log$ |
\(\hat{y}\) | $\hat{y}$ |
\(\overline{a+b+c+d}\) | $\overline{a+b+c+d}$ |
\(\lg\) | $\lg$ |
\(\check{y}\) | $\check{y}$ |
\(\underline{a+b+c+d}\) | $\underline{a+b+c+d}$ |
\(\ln\) | $\ln$ |
\(\breve{y}\) | $\breve{y}$ |
\(\overbrace{a+\underbrace{b+c}{1.0}+d}^{2.0}\) | $\overbrace{a+\underbrace{b+c}{1.0}+d}^{2.0}$ |
三角运算符 | markdown语言 | 微积分运算符 | markdown语言 | 逻辑运算符 | markdown语言 |
---|---|---|---|---|---|
\(\bot\) | $\bot$ |
\(\prime\) | $\prime$ |
\(\because\) | $\because$ |
\(\angle\) | $\angle$ |
\(\int\) | $\int$ |
\(\therefore\) | $\therefore$ |
\(30^\circ\) | $30^\circ$ |
\(\iint\) | $\iint$ |
\(\forall\) | $\forall$ |
\(\sin\) | $\sin$ |
\(\iiint\) | $\iiint$ |
\(\exists\) | $\exists$ |
\(\cos\) | $\cos$ |
\(\iiiint\) | $\iiiint$ |
\(\not=\) | $\not=$ |
\(\tan\) | $\tan$ |
\(\oint\) | $\oint$ |
\(\not>\) | $\not>$ |
\(\cot\) | $\cot$ |
\(\lim\) | $\lim$ |
\(\not\subset\) | $\not\subset$ |
\(\sec\) | $\sec$ |
\(\infty\) | $\infty$ |
||
\(\csc\) | $\csc$ |
\(\nabla\) | $\nabla$ |
箭头符号 | markdown语言 |
---|---|
\(\uparrow\) | $\uparrow$ |
\(\downarrow\) | $\downarrow$ |
\(\Uparrow\) | $\Uparrow$ |
\(\Downarrow\) | $\Downarrow$ |
\(\rightarrow\) | $\rightarrow$ |
\(\leftarrow\) | $\leftarrow$ |
\(\Rightarrow\) | $\Rightarrow$ |
\(\Leftarrow\) | $\Leftarrow$ |
\(\longrightarrow\) | $\longrightarrow$ |
\(\longleftarrow\) | $\longleftarrow$ |
\(\Longrightarrow\) | $\Longrightarrow$ |
\(\Longleftarrow\) | $\Longleftarrow$ |
\(f: {\mathbf x_t} \mapsto {\mathbf y_t}\) | $f: {\mathbf x_t} \mapsto {\mathbf y_t}$ |
\(\Longleftrightarrow\) | \Longleftrightarrow |
更多关于箭头的符号见:MathJax 支持的 Latex 符号总结(各种箭头符号)
特殊符号
- \(\boldsymbol{\hat y} = \boldsymbol{W} \boldsymbol{x}\) 的输入
代码:
$\boldsymbol{\hat y} = \boldsymbol{W} \boldsymbol{x}$
- \(\ell_p\) 范数:
$\ell_p$
对于一些特殊的数学符号可以使用 \operatorname{}
或者 \text{}
来进行转换,如:$\text{cov}$
和 $\operatorname{s.t.}$
便显示为:\(\text{cov}\) 和 \(\operatorname{s.t.}\)
还有:
$A \xrightarrow{f} B \; a \; \bot b \; \overset{def}{=}$
\(A \xrightarrow{f} B \; a \; \bot b \; \overset{def}{=}\)
$$
\underset{x\in S\subseteq X}{\operatorname{arg\,max}}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
$$
\[ \underset{x\in S\subseteq X}{\operatorname{arg\,max}}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
\]
$$
\operatorname*{\arg\max}_{x\in S\subseteq X}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
$$
\[\operatorname*{\arg\max}_{x \in S \subseteq X}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
\]
- 更多特殊符号可以访问:Detexify
- 更多关于数学符号的内容,参 考 L ATEX Mathematical Symbols
- 关于数学符号的解释见 List of mathematical symbols by subject
- 更多精彩参考http://www.cnblogs.com/q735613050/p/7253073.html
对齐多行公式
$$
\begin{aligned}
a &= b^2 + c^2\\
&= w^3 + b
\end{aligned}
$$
显示:
\[\begin{aligned}
a &= b^2 + c^2\\
&= w^3 + b
\end{aligned}
\]
关于矩阵的语法
$$
\begin{Bmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{Bmatrix}
\tag{7}
$$
显示:
\[\begin{Bmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{Bmatrix}
\tag{7}
\]
更多矩阵设计:
$$
\begin{vmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{vmatrix}
\tag{8}
$$
$$
\begin{Vmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{Vmatrix}
\tag{9}
$$
$$
\bigl(
\begin{smallmatrix}
...
\end{smallmatrix}
\bigr)
$$
$$
\left[
\begin{array}{cc|c}
1 & 2 & 3 \\
4 & 5 & 6
\end{array}
\right] \tag{12}
$$
显示:
\[\begin{vmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{vmatrix}
\tag{8}
\]
\[\begin{Vmatrix}
1&2&3\\
4&5&6\\
7&8&9
\end{Vmatrix}
\tag{9}
\]
\[\bigl(
\begin{smallmatrix}
...
\end{smallmatrix}
\bigr)
\]
\[\left[
\begin{array}{cc|c}
1 & 2 & 3 \\
4 & 5 & 6
\end{array}
\right] \tag{12}
\]
探寻有趣之事!