简单的收集了一些Latex数学符号的写法，方便需要时查找。
操作符
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\pm$ |
\pm |
$\mp$ |
\mp |
$\times$ |
\times |
| $\div$ |
\div |
$\cdot$ |
\cdot |
$\ast$ |
\ast |
| $\star$ |
\star |
$\dagger$ |
\dagger |
$\ddagger$ |
\ddagger |
| $\amalg$ |
\amalg |
$\cap$ |
\cap |
$\cup$ |
\cup |
| $\uplus$ |
\uplus |
$\sqcap$ |
\sqcap |
$\sqcup$ |
\sqcup |
| $\vee$ |
\vee |
$\wedge$ |
\wedge |
$\oplus$ |
\oplus |
| $\ominus$ |
\ominus |
$\otimes$ |
\otimes |
$\circ$ |
\circ |
| $\bullet$ |
\bullet |
$\diamond$ |
\diamond |
$\lhd$ |
\lhd |
| $\rhd$ |
\rhd |
$\unlhd$ |
\unlhd |
$\unrhd$ |
\unrhd |
| $\oslash$ |
\oslash |
$\odot$ |
\odot |
$\bigcirc$ |
\bigcirc |
| $\triangleleft$ |
\triangleleft |
$\Diamond$ |
\Diamond |
$\bigtriangleup$ |
\bigtriangleup |
| $\bigtriangledown$ |
\bigtriangledown |
$\Box$ |
\Box |
$\triangleright$ |
\triangleright |
| $\setminus$ |
\setminu |
$\wr$ |
\wr |
$\sqrt{x}$ |
\sqrt{x} |
| $x^{\circ}$ |
x^{\circ} |
$\triangledown$ |
\triangledown |
$\sqrt[n]{x}$ |
\sqrt[n]{x} |
| $a^x$ |
a^x |
$a^{xyz}$ |
a^{xyz} |
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关系符
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\le$ |
\le |
$\ge$ |
\ge |
$\neq$ |
\ne |
| $\sim$ |
\sim |
$\ll$ |
\ll |
$\gg$ |
\gg |
| $\doteq$ |
\doteq |
$\simeq$ |
\simeq |
$\subset$ |
\subset |
| $\supset$ |
\supset |
$\approx$ |
\approx |
$\asymp$ |
\asymp |
| $\subseteq$ |
\subseteq |
$\supseteq$ |
\supseteq |
$\cong$ |
\cong |
| $\smile$ |
\smile |
$\sqsubset$ |
\sqsubset |
$\sqsupset$ |
\sqsupset |
| $\equiv$ |
\equiv |
$\frown$ |
\frown |
$\sqsubseteq$ |
\sqsubseteq |
| $\sqsupseteq$ |
\sqsupseteq |
$\propto$ |
\propto |
$\bowtie$ |
\bowtie |
| $\in$ |
\in |
$\ni$ |
\ni |
$\prec$ |
\prec |
| $\succ$ |
\succ |
$\vdash$ |
\vdash |
$\dashv$ |
\dashv |
| $\preceq$ |
\preceq |
$\succeq$ |
\succeq |
$\models$ |
\models |
| $\perp$ |
\perp |
$\parallel$ |
\parallel |
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| $\mid$ |
\mid |
$\bumpeq$ |
\bumpeq |
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只要将not放在符号前面或者在 \ 和单词之间插入一个 n ，就可以形成许多这些关系的否定形式，这里有一些例子，加上一些其他的否定，它也适用于许多其他的。
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\nmid$ |
\nmid |
$\nleq$ |
\nleq |
$\ngeq$ |
\ngeq |
| $\nsim$ |
\nsim |
$\ncong$ |
\ncong |
$\nparallel$ |
\nparallel |
| $\not<$ |
\not< |
$\not>$ |
\not> |
$\not=$ |
\not= or \neq |
| $\not\le$ |
\not\le |
$\not\ge$ |
\not\ge |
$\not\sim$ |
\not\sim |
| $\not\approx$ |
\not\approx |
$\not\cong$ |
\not\cong |
$\not\equiv$ |
\not\equiv |
| $\not\parallel$ |
\not\paralle |
$\nless$ |
\nless |
$\ngtr$ |
\ngtr |
| $\lneq$ |
\lneq |
$\gneq$ |
\gneq |
$\lnsim$ |
\lnsim |
| $\lneqq$ |
\lneqq |
$\gneqq$ |
\gneqq |
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希腊字母
小写
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\alpha$ |
\alpha |
$\beta$ |
\beta |
$\gamma$ |
\gamma |
$\delta$ |
\delta |
| $\epsilon$ |
\epsilon |
$\varepsilon$ |
\varepsilon |
$\zeta$ |
\zeta |
$\eta$ |
\eta |
| $\theta$ |
\theta |
$\vartheta$ |
\vartheta |
$\iota$ |
\iota |
$\kappa$ |
\kappa |
| $\lambda$ |
\lambda |
$\mu$ |
\mu |
$\nu$ |
\nu |
$\xi$ |
\xi |
| $\pi$ |
\pi |
$\varpi$ |
\varpi |
$\rho$ |
\rho |
$\varrho$ |
\varrho |
| $\sigma$ |
\sigma |
$\varsigma$ |
\varsigma |
$\tau$ |
\tau |
$\upsilon$ |
\upsilon |
| $\phi$ |
\phi |
$\varphi$ |
\varphi |
$\chi$ |
\chi |
$\psi$ |
\psi |
| $\omega$ |
\omega |
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大写
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\Gamma$ |
\Gamma |
$\Delta$ |
\Delta |
$\Theta$ |
\Theta |
$\Lambda$ |
\Lambda |
| $\Xi$ |
\Xi |
$\Pi$ |
\Pi |
$\Sigma$ |
\Sigma |
$\Upsilon$ |
\Upsilon |
| $\Phi$ |
\Phi |
$\Psi$ |
\Psi |
$\Omega$ |
\Omega |
$\nabla$ |
\nabla |
加粗
在公式中的字母加粗：
| Symbol |
Command |
| $\boldsymbol{m}$ |
\boldsymbol{m} |
空心字母
| Symbol |
Command |
| $\mathbb{M}$ |
\mathbb{M} |
| $\mathbb{R}$ |
\mathbb{R} |
箭头
| Symbol |
Command |
Symbol |
Command |
| $\gets$ |
\gets |
$\to$ |
\to |
| $\leftarrow$ |
\leftarrow |
$\Leftarrow$ |
\Leftarrow |
| $\rightarrow$ |
\rightarrow |
$\Rightarrow$ |
\Rightarrow |
| $\leftrightarrow$ |
\leftrightarrow |
$\Leftrightarrow$ |
\Leftrightarrow |
| $\mapsto$ |
\mapsto |
$\hookleftarrow$ |
\hookleftarrow |
| $\leftharpoonup$ |
\leftharpoonup |
$\leftharpoondown$ |
\leftharpoondown |
| $\rightleftharpoons$ |
\rightleftharpoons |
$\longleftarrow$ |
\longleftarrow |
| $\Longleftarrow$ |
\Longleftarrow |
$\longrightarrow$ |
\longrightarrow |
| $\Longrightarrow$ |
\Longrightarrow |
$\longleftrightarrow$ |
\longleftrightarrow |
| $\Longleftrightarrow$ |
\Longleftrightarrow |
$\longmapsto$ |
\longmapsto |
| $\hookrightarrow$ |
\hookrightarrow |
$\rightharpoonup$ |
\rightharpoonup |
| $\rightharpoondown$ |
\rightharpoondown |
$\leadsto$ |
\leadsto |
| $\uparrow$ |
\uparrow |
$\Uparrow$ |
\Uparrow |
| $\downarrow$ |
\downarrow |
$\Downarrow$ |
\Downarrow |
| $\updownarrow$ |
\updownarrow |
$\Updownarrow$ |
\Updownarrow |
| $\nearrow$ |
\nearrow |
$\searrow$ |
\searrow |
| $\swarrow$ |
\swarrow |
$\nwarrow$ |
\nwarrow |
(对于不喜欢键入长串字母的人，\iff和\implies可以分别替代\Longleftrightarrow和\ longrighttarrow)
点
| Symbol |
Command |
Symbol |
Command |
| $\cdot$ |
\cdot |
$\vdots$ |
\vdots |
| $\dots$ |
\dots |
$\ddots$ |
\ddots |
上标
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\hat{x}$ |
\hat{x |
$\check{x}$ |
\check{x} |
$\dot{x}$ |
\dot{x} |
| $\breve{x}$ |
\breve{x} |
$\acute{x}$ |
\acute{x} |
$\ddot{x}$ |
\ddot{x} |
| $\grave{x}$ |
\grave{x} |
$\tilde{x}$ |
\tilde{x} |
$\mathring{x}$ |
\mathring{x} |
| $\bar{x}$ |
\bar{x} |
$\vec{x}$ |
\vec{x} |
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当对i和j应用上标时，可以使用\imath和\jmath来防止点干扰上标:
| Symbol |
Command |
Symbol |
Command |
| $\vec{\jmath}$ |
\vec{\jmath} |
$\tilde{\imath}$ |
\tilde{\imath} |
\tilde和\hat有很宽的版本，可以让你强调一个表达:
| Symbol |
Command |
Symbol |
Command |
| $\widehat{7+x}$ |
\widehat{7+x} |
$\widetilde{abc}$ |
\widetilde{abc} |
其他
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\infty$ |
\infty |
$\triangle$ |
\triangle |
$\angle$ |
\angle |
| $\aleph$ |
\aleph |
$\hbar$ |
\hbar |
$\imath$ |
\imath |
| $\jmath$ |
\jmath |
$\ell$ |
\ell |
$\wp$ |
\wp |
| $\Re$ |
\Re |
$\Im$ |
\Im |
$\mho$ |
\mho |
| $\prime$ |
\prime |
$\emptyset$ |
\emptyset |
$\nabla$ |
\nabla |
| $\surd$ |
\surd |
$\partial$ |
\partial |
$\top$ |
\top |
| $\bot$ |
\bot |
$\vdash$ |
\vdash |
$\dashv$ |
\dashv |
| $\forall$ |
\forall |
$\exists$ |
\exists |
$\neg$ |
\neg |
| $\flat$ |
\flat |
$\natural$ |
\natural |
$\sharp$ |
\sharp |
| $\backslash$ |
\backslash |
$\Box$ |
\Box |
$\Diamond$ |
\Diamond |
| $\clubsuit$ |
\clubsuit |
$\diamondsuit$ |
\diamondsuit |
$\heartsuit$ |
\heartsuit |
| $\spadesuit$ |
\spadesuit |
$\Join$ |
\Join |
$\blacksquare$ |
\blacksquare |
| $\checkmark$ |
\checkmark |
$\mathbb{R}$ |
\mathbb{R} |
$\textcopyright$ |
\copyright |
| £ |
\pounds |
$\square$ |
\square |
$\cup$ |
\cup |
| $\bigstar$ |
\bigstar |
$\in$ |
\in |
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命令符
有些符号用于命令中，因此需要以特殊的方式处理它们。
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\backslash$ |
\backslash |
$&$ |
\& |
$%$ |
\% |
$#$ |
\# |
| $_$ |
\_ |
${$ |
\{ |
$}$ |
\} |
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您可能会注意到，如果使用其中任何一个来排版垂直较大的表达式，比如
$$(\frac{a}{x} )^2$$
得到的表达式的括号的大小不对
$$(\frac{a} {x} )^2$$
跨行或跨列的符号
| symbol |
command |
| $ f(x) = \begin{cases} x^2 & x \ge 0 \\ x & x < 0 \end{cases} $ |
f(x)=\ begin{cases} x^2 & x \ge 0 \ x & x<0 \end{cases} |
| $ \left\lceil\frac{x}{y}\right\rceil $ |
\left\lceil\frac{x}{y}\right\rceil |
| $ \left\lfloor\frac{x}{y}\right\rfloor $ |
\left\lfloor\frac{x}{y}\right\rfloor |
| $ \underbrace{a_0+a_1+a_2+\cdots+a_n}_{x} $ |
\underbrace{a_0+a_1+a_2+\cdots+a_n}_{x} |
| $ \overbrace{a_0+a_1+a_2+\cdots+a_n}^{x} $ |
\overbrace{a_0+a_1+a_2+\cdots+a_n}^{x} |
| $\arg \underset{1\leq k \leq n} {max} \frac{\lambda_k}{\lambda_{k+1} }$ |
\arg \underset{1\leq k \leq n} {max} \frac{\lambda_k}{\lambda_{k+1} } |
\left和\right也可以用来调整下列符号的大小:
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\uparrow$ |
\uparrow |
$\downarrow$ |
\downarrow |
$\updownarrow$ |
\updownarrow |
| $\Uparrow$ |
\Uparrow |
$\Downarrow$ |
\Downarrow |
$\Updownarrow$ |
\Updownarrow |
| Symbol |
Command |
Symbol |
Command |
Symbol |
Command |
| $\sum$ |
\sum |
$\int$ |
\int |
$\oint$ |
\oint |
| $\prod$ |
\prod |
$\coprod$ |
\coprod |
$\bigcap$ |
\bigcap |
| $\bigcup$ |
\bigcup |
$\bigsqcup$ |
\bigsqcup |
$\bigvee$ |
\bigvee |
| $\bigwedge$ |
\bigwedge |
$\bigodot$ |
\bigodot |
$\bigotimes$ |
\bigotimes |
| $\bigoplus$ |
\bigoplus |
$\biguplus$ |
\biguplus |
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