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本文主要内容转自MathJax 符号（有修改）

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本篇文章简要地列出了MathJax中的所有符号（可能不全），并按照形状进行分类。在MathType开启Tex支持后，文章列出的大部分符号均可以获得较好的支持，但部分非Latex原生符号如color等可能无法正常使用。

区间

区间类型 Latex 语法
$\langle\rangle$ \langle\rangle
$\lfloor\rfloor$ \lfloor\rfloor
$\lceil\rceil$ \lceil\rceil
$()$ ()
$[]$ []
${}$ \{\}
$\lmoustache\rmoustache$ \lmoustache\rmoustache
$\lvert\rvert$ \lvert\rvert
$\lVert\rVert$ \lVert\rVert
$\lgroup\rgroup$ \lgroup\rgroup

字母

希腊字母

大写 Latex 语法 小写 Latex 语法
$A$ A $\alpha$ \alpha
$B$ B $\beta$ \alpha
$\Gamma,\varGamma$ \Gamma,\varGamma $\gamma$ \gamma
$\Delta,\varDelta$ \Delta,\varDelta $\delta$ \delta
$E$ E $\epsilon,\varepsilon$ \epsilon,\varepsilon
$Z$ Z $\zeta$ \zeta
$H$ H $\eta$ \eta
$\Theta,\varTheta$ \Theta,\varTheta $\theta,\vartheta$ \theta,\vartheta
$I$ I $\iota$ \iota
$K$ K $\kappa,\varkappa$ \kappa,\varkappa
$\Lambda,\varLambda$ \Lambda,\varLambda $\lambda$ \lambda
$M$ M $\mu$ \mu
$N$ N $\nu$ \nu
$\Xi,\varXi$ \Xi,\varXi $\xi$ \xi
$O$ O $\omicron$ \omicron
$\pi,\Pi$ \pi,\Pi $\pi,\varpi$ \pi,\varpi
$P$ P $\rho,\varrho$ \rho,\varrho
$\Sigma,\varSigma$ \sum,\varsum $\sigma,\varsigma$ \sigma,\varsigma
$T$ T $\tau$ \tau
$\Upsilon,\varUpsilon$ \Upsilon,\varUpsilon $\upsilon$ \upsilon
$\Phi,\varPhi$ \Phi,\varPhi $\phi,\varphi$ \phi,\varphi
$X$ X $\chi$ \chi
$\Psi,\varPsi$ \Psi,\varPsi $\psi$ \psi
$\Omega,\varOmega$ \Omega,\varOmega $\omega$ \omega

希伯来字母

符号 Latex 语法
$\aleph $ \aleph
$\beth $ \beth
$\gimel $ \gimel
$\daleth $ \daleth

类字母符号

渲染演示 Latex 语法
$\Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash$ \Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash
$\Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp$ \Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp

字体相关

字体与注释

在使用\mathxx{}时，公式中的所有字母将会转换成对应字体。而使用textxx{}时，将{}作为文本处理，特殊字符将不会被转换。

大写字符示例 小写字符示例 数字示例 Latex 语法
$ABCDEFGHIJKLMNOPQRSTUVWXYZ$ $abcdefghijklmnopqrstuvwxyz$ $0123456789$ 原始字体
$\mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathrm{abcdefghijklmnopqrstuvwxyz}$ $\mathrm{0123456789}$ \mathrm{}
$\mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathbf{abcdefghijklmnopqrstuvwxyz}$ $\mathbf{0123456789}$ \mathbf{}
$\mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathbb{abcdefghijklmnopqrstuvwxyz}$ $\mathbb{0123456789}$ \mathbb{}
$\mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathcal{abcdefghijklmnopqrstuvwxyz}$ $\mathcal{0123456789}$ \mathcal{}
$\mathit{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathit{abcdefghijklmnopqrstuvwxyz}$ $\mathit{0123456789}$ \mathit{}
$\mathscr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathscr{abcdefghijklmnopqrstuvwxyz}$ $\mathscr{0123456789}$ \mathscr{}
$\mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathfrak{abcdefghijklmnopqrstuvwxyz}$ $\mathfrak{0123456789}$ \mathfrak{}
$\mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathsf{abcdefghijklmnopqrstuvwxyz}$ $\mathsf{0123456789}$ \mathsf{}
$\mathtt{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ $\mathtt{abcdefghijklmnopqrstuvwxyz}$ $\mathtt{0123456789}$ \mathtt{}
$\text{\alpha in the text mode } \alpha$ \text{\alpha in the text mode } \alpha
$\textrm{\alpha in the text mode } \alpha$ \textrm{\alpha in the text mode } \alpha
$\textbf{\alpha in the text mode } \alpha$ \textbf{\alpha in the text mode } \alpha
$\textit{\alpha in the text mode } \alpha$ \textit{\alpha in the text mode } \alpha
$\textsf{\alpha in the text mode } \alpha$ \textsf{\alpha in the text mode } \alpha
$\texttt{\alpha in the text mode } \alpha$ \texttt{\alpha in the text mode } \alpha
$\boldsymbol{\alpha}\mathbf{\alpha}$ \boldsymbol{\alpha}\mathbf{\alpha}

颜色

命令\color{}{}中的第一个参数可以是颜色名称，也可以是 RGB 参数前提是使用`colorv2`代替`color`默认加载。第二个参数则是正式染色的文字。

颜色 渲染演示 Latex 语法
black $\color{black}{ABCDabcd1234}$ \color{black}{ABCDabcd1234}
grey $\color{grey}{ABCDabcd1234}$ \color{grey}{ABCDabcd1234}
silver $\color{silver}{ABCDabcd1234}$ \color{silver}{ABCDabcd1234}
white $\color{white}{ABCDabcd1234}$ \color{white}{ABCDabcd1234}
maroon $\color{maroon}{ABCDabcd1234}$ \color{maroon}{ABCDabcd1234}
red $\color{red}{ABCDabcd1234}$ \color{red}{ABCDabcd1234}
yellow $\color{yellow}{ABCDabcd1234}$ \color{yellow}{ABCDabcd1234}
lime $\color{lime}{ABCDabcd1234}$ \color{lime}{ABCDabcd1234}
olive $\color{olive}{ABCDabcd1234}$ \color{olive}{ABCDabcd1234}
green $\color{green}{ABCDabcd1234}$ \color{green}{ABCDabcd1234}
teal $\color{teal}{ABCDabcd1234}$ \color{teal}{ABCDabcd1234}
auqa $\color{auqa}{ABCDabcd1234}$ \color{auqa}{ABCDabcd1234}
blue $\color{blue}{ABCDabcd1234}$ \color{blue}{ABCDabcd1234}
navy $\color{navy}{ABCDabcd1234}$ \color{navy}{ABCDabcd1234}
purple $\color{purple}{ABCDabcd1234}$ \color{purple}{ABCDabcd1234}
fuchsia $\color{fuchsia}{ABCDabcd1234}$ \color{fuchsia}{ABCDabcd1234}

公式大小

渲染演示 Latex 语法
$\tiny{AB}$ \tiny{AB}
$\Tiny{AB}$ \Tiny{AB}
$AB$ AB
$\large{AB}$ \large{AB}
$\Large{AB}$ \Large{AB}
$\LARGE{AB}$ \LARGE{AB}
$\huge{AB}$ \huge{AB}
$\Huge{AB}$ \Huge{AB}

箭头

渲染演示 Latex 语法
$\uparrow,\downarrow,\leftarrow,\rightarrow$ \uparrow,\downarrow,\leftarrow,\rightarrow
$\Uparrow,\Downarrow,\Leftarrow,\Rightarrow$ \Uparrow,\Downarrow,\Leftarrow,\Rightarrow
$\upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows$ \upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows
$\nwarrow,\nearrow,\swarrow,\searrow$ \nwarrow,\nearrow,\swarrow,\searrow
$\upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright$ \upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright
$\leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup$ \leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup
$\longleftarrow,\longrightarrow,\longleftrightarrow$ \longleftarrow,\longrightarrow,\longleftrightarrow
$\Longleftarrow,\Longrightarrow,\Longleftrightarrow$ \Longleftarrow,\Longrightarrow,\Longleftrightarrow
$\nleftarrow,\nrightarrow,\nleftrightarrow$ \nleftarrow,\nrightarrow,\nleftrightarrow
$\nLeftarrow,\nRightarrow,\nLeftrightarrow$ \nLeftarrow,\nRightarrow,\nLeftrightarrow
$\leftrightarrow,\updownarrow$ \leftrightarrow,\updownarrow
$\Leftrightarrow,\Updownarrow$ \Leftrightarrow,\Updownarrow
$\twoheadleftarrow,\twoheadrightarrow$ \twoheadleftarrow,\twoheadrightarrow
$\hookleftarrow,\hookrightarrow$ \hookleftarrow,\hookrightarrow
$\Lleftarrow,\Rrightarrow$ \Lleftarrow,\Rrightarrow
$\Lsh,\Rsh$ \Lsh,\Rsh
$\dashleftarrow,\dashrightarrow$ \dashleftarrow,\dashrightarrow
$\looparrowleft,\looparrowright$ \looparrowleft,\looparrowright
$\leftarrowtail,\rightarrowtail$ \leftarrowtail,\rightarrowtail
$\circlearrowleft,\circlearrowright$ \circlearrowleft,\circlearrowright
$\curvearrowleft,\curvearrowright$ \curvearrowleft,\curvearrowright
$\leftrightarrows,\rightleftarrows$ \leftrightarrows,\rightleftarrows
$\rightleftharpoons,\leftrightharpoons$ \rightleftharpoons,\leftrightharpoons
$\longmapsto$ \longmapsto
$\mapsto$ \mapsto
$\leftrightsquigarrow,\rightsquigarrow$ \leftrightsquigarrow,\rightsquigarrow

点和省略号

渲染演示 Latex 语法
$a\cdot b$ a\cdot b
$a\cdotp b$ a\cdotp b
$a\centerdot b$ a\centerdot b
$\cdots$ \cdots
$\ddots$ \ddots
$\dots$ \dots
$\ldotp$ \ldotp
$\ldots$ \ldots
$\vdots$ \vdots

函数

渲染演示 Latex 语法 渲染演示 Latex 语法 渲染演示 Latex 语法
$\sin$ \sin $\cos$ \cos $\tan$ \tan
$\cot$ \cot $\csc$ \csc $\sec$ \sec
$\arccos$ \arccos $\arcsin$ \arcsin $\arctan$ \arctan
$\sinh$ \sinh $\cosh$ \cosh $\tanh$ \tanh
$\coth$ \coth $\exp$ \exp $\log$ \log
$\lg$ \lg $\ln$ \ln $\max$ \max
$\min$ \min $\gcd$ \gcd

微积分与极限

渲染演示 Latex 语法 渲染演示 Latex 语法 渲染演示 Latex 语法
$\nabla$ \nabla $\partial$ \partial $\prime,'$ \prime,'
$\inf$ \inf $\int,\iint,\iiint,\iiiint$ \int,\iint,\iiint,\iiiint $\oint$ \oint
$\lim$ \lim $\liminf$ \liminf $\limsup$ \limsup
$\injlim$ \injlim $\projlim$ \projlim $\varinjlim$ \varinjlim
$\varlimsup$ \varlimsup $\varliminf$ \varliminf $\varprojlim$ \varprojlim
$\infty$ \infty $\idotsint$ \idotsint $\Delta$ \Delta

运算符和集合

关系运算符

渲染演示 Latex 语法
$>,\ge,\geqq,\geqslant,\gg,\ggg,\gt,\gtrdot,\eqslantgtr$ >,\ge,\geqq,\geqslant,\gg,\ggg,\gt,\gtrdot,\eqslantgtr
$<,\le,\leqq,\leqslant,\ll,\lll,\lt,\lessdot,\eqslantless$ <,\le,\leqq,\leqslant,\ll,\lll,\lt,\lessdot,\eqslantless
$\gtrapprox,\gnapprox,\gneq,\gneqq,\gvertneqq,\gtrsim,\gnsim$ \gtrapprox,\gnapprox,\gneq,\gneqq,\gvertneqq,\gtrsim,\gnsim
$\lessapprox,\lnapprox,\lneq,\lneqq,\lvertneqq,\lesssim,\lnsim$ \lessapprox,\lnapprox,\lneq,\lneqq,\lvertneqq,\lesssim,\lnsim
$\gtreqless,\gtreqqless,\gtrless,\lesseqgtr,\lesseqqgtr,\lessgtr$ \gtreqless,\gtreqqless,\gtrless,\lesseqgtr,\lesseqqgtr,\lessgtr
$\ngeq,\ngeqq,\ngeqslant,\ngtr,\nleq,\nleqq,\nleqslant,\nless$ \ngeq,\ngeqq,\ngeqslant,\ngtr,\nleq,\nleqq,\nleqslant,\nless
$\sqsubset,\sqsupset,\sqsubseteq,\sqsupseteq$ \sqsubset,\sqsupset,\sqsubseteq,\sqsupseteq
$\prec,\preccurlyeq,\curlyeqprec,\preceq,\precsim,\precapprox$ \prec,\preccurlyeq,\curlyeqprec,\preceq,\precsim,\precapprox
$\precnapprox,\precneqq,\precnsim,\nprec,\npreceq$ \precnapprox,\precneqq,\precnsim,\nprec,\npreceq
$\succ,\curlyeqsucc,\succcurlyeq,\succeq,\succsim,\succapprox$ \succ,\curlyeqsucc,\succcurlyeq,\succeq,\succsim,\succapprox
$\succnapprox,\succneqq,\succnsim,\nsucc,\nsucceq$ \succnapprox,\succneqq,\succnsim,\nsucc,\nsucceq
$\sim,\nsim,\thicksim,\backsim,\simeq,\backsimeq,\eqsim$ \sim,\nsim,\thicksim,\backsim,\simeq,\backsimeq,\eqsim
$\approx,\thickapprox,\approxeq$ \approx,\thickapprox,\approxeq
$\vdash,\dashv,\Vdash,\vDash,\Vvdash,\models$ \vdash,\dashv,\Vdash,\vDash,\Vvdash,\models
$\nvdash,\nVdash,\nVDash,\nvDash$ \nvdash,\nVdash,\nVDash,\nvDash
$\ntriangleleft,\ntriangleright$ \ntriangleleft,\ntriangleright
$\trianglelefteq,\trianglerighteq,\ntrianglelefteq,\ntrianglerighteq$ \trianglelefteq,\trianglerighteq,\ntrianglelefteq,\ntrianglerighteq
$=,\eqcirc,\equiv,\ne,\cong,\ncong$ =,\eqcirc,\equiv,\ne,\cong,\ncong
$\Doteq,\doteq,\triangleq$ \Doteq,\doteq,\triangleq
$\Bumpeq,\bumpeq,\circeq$ \Bumpeq,\bumpeq,\circeq
$\propto,\varpropto$ \propto,\varpropto

算术与逻辑运算符

渲染演示 Latex 语法
$\circ,\bullet,\bigcirc$ \circ,\bullet,\bigcirc
$\cap,\Cap,\bigcap,\doublecap,\sqcap$ \cap,\Cap,\bigcap,\doublecap,\sqcap
$\cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup$ \cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup
$+,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum$ +,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum
$\ast,\times,\div,\divideontimes,\prod$ \ast,\times,\div,\divideontimes,\prod
$\boxplus,\boxminus,\boxtimes$ \boxplus,\boxminus,\boxtimes
$\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes$ \odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes
$\sqrt{16}=\sqrt[3]{64}$ \sqrt{16}=\sqrt[3]{64}
$\lor,\vee,\bigvee,\veebar,\curlyvee$ \lor,\vee,\bigvee,\veebar,\curlyvee
$\land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge$ \land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge
$\lnot,\neg$ \lnot,\neg
$\because,\therefore$ \because,\therefore
$\forall,\exists,\nexists$ \forall,\exists,\nexists

取模运算\mod的用法和比较

渲染演示 Latex 语法
$x^2\equiv 1(\mod 5)$ x^2\equiv 1(\mod 5)
$x^2\equiv 1(\bmod 5)$ x^2\equiv 1(\bmod 5)
$x^2\equiv 1\pmod{5}$ x^2\equiv 1\pmod{5}

集合

渲染演示 Latex 语法
$\in,\notin,\ni,\owns$ \in,\notin,\ni,\owns
$\subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq$ \subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq
$\supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq$ \supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq
$\subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq$ \subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq
$\supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq$ \supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq
$\emptyset,\varnothing$ \emptyset,\varnothing

上下层符号

分式\frac的用法和比较

行内渲染演示 行间渲染演示 Latex 语法
$\frac{a-1}{b-1}$ $$\frac{a-1}{b-1}$$ \frac{a-1}{b-1}
$\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}$ $$\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}$$ \cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}
$\dfrac{a-1}{b-1}$ $$\dfrac{a-1}{b-1}$$ \dfrac{a-1}{b-1}
$\tfrac{a-1}{b-1}$ $$\tfrac{a-1}{b-1}$$ \tfrac{a-1}{b-1}
${a-1 \over b-1}$ $${a-1 \over b-1}$$ {a-1 \over b-1}

公式上下层符号

行内渲染演示 Latex 语法
$\acute{123}$ \acute{123}
$\bar{123}$ \bar{123}
$\breve{123}$ \breve{123}
$\check{123}$ \check{123}
$\dot{123}$ \dot{123}
$\ddot{123}$ \ddot{123}
$\dddot{123}$ \dddot{123}
$\ddddot{123}$ \ddddot{123}
$\grave{123}$ \grave{123}
$\hat{123}$ \hat{123}
$\mathring{123}$ \mathring{123}
$\tilde{123}$ \tilde{123}
$\vec{123}$ \vec{123}
$\overleftarrow{123}$ \overleftarrow{123}
$\overrightarrow{123}$ \overrightarrow{123}
$\overleftrightarrow{123}$ \overleftrightarrow{123}
$\overline{123}$ \overline{123}
$\widehat{123}$ \widehat{123}
$\widetilde{123}$ \widetilde{123}
$\underline{123}$ \underline{123}
$\underset{123}{abc}$ \underset{123}{abc}
$\overset{123}{abc}$ \overset{123}{abc}
$\underbrace{123}_{abc}$ \underbrace{123}_{abc}
$\xleftarrow[123]{abc}$ \xleftarrow[123]{abc}
$\xrightarrow[123]{abc}$ \xrightarrow[123]{abc}

其余符号

几何符号

部分几何符号可能归入了特殊符号中。

渲染演示 Latex 语法
$\angle,\measuredangle,\sphericalangle$ \angle,\measuredangle,\sphericalangle
$\perp,\bot$ \perp,\bot
$\mid,\nmid,\parallel,\nparallel$ \mid,\nmid,\parallel,\nparallel
$\shortmid,\shortparallel,\nshortmid,\nshortparallel$ \shortmid,\shortparallel,\nshortmid,\nshortparallel

特殊符号

渲染演示 Latex 语法
$\bigtriangleup,\triangle,\vartriangle$ \bigtriangleup,\triangle,\vartriangle
$\bigtriangledown,\triangledown$ \bigtriangledown,\triangledown
$\triangleleft,\vartriangleleft,\lhd$ \triangleleft,\vartriangleleft,\lhd
$\triangleright,\vartriangleright,\rhd$ \triangleright,\vartriangleright,\rhd
$\bigstar,\blacklozenge,\blacksquare$ \bigstar,\blacklozenge,\blacksquare
$\blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright$ \blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright
$\Box,\square,\boxdot$ \Box,\square,\boxdot
$\circledast,\circledcirc,\circleddash,\circledR,\circledS$ \circledast,\circledcirc,\circleddash,\circledR,\circledS
$\dagger,\ddagger$ \dagger,\ddagger
$\diagdown,\diagup$ \diagdown,\diagup
$\diamond,\Diamond,\lozenge$ \diamond,\Diamond,\lozenge
$\heartsuit,\diamondsuit,\clubsuit,\spadesuit$ \heartsuit,\diamondsuit,\clubsuit,\spadesuit
$\flat,\natural,\sharp$ \flat,\natural,\sharp
$\checkmark,\surd$ \checkmark,\surd
$\smile,\frown,\asymp$ \smile,\frown,\asymp
$\ulcorner\urcorner$ \ulcorner\urcorner
$\llcorner\lrcorner$ \llcorner\lrcorner
$\LaTeX,\TeX$ \LaTeX,\TeX
$\Finv$ \Finv
$\maltese$ \maltese
$\backprime$ \backprime
$\between$ \between
$\multimap$ \multimap
$\pitchfork$ \pitchfork
$\star$ \star
$\yen$ \yen
$\intercal$ \intercal
$\wr$ \wr
$\backslash$ \backslash

组合数binom的用法和比较

行内渲染演示 行间渲染演示 Latex 语法
$\binom{n+1}{m+1}$ $$\binom{n+1}{m+1}$$ \binom{n+1}{m+1}
${n+1\choose m+1}$ $${n+1\choose m+1}$$ {n+1\choose m+1}
$\dbinom{n+1}{m+1}$ $$\dbinom{n+1}{m+1}$$ \dbinom{n+1}{m+1}
$\tbinom{n+1}{m+1}$ $$\tbinom{n+1}{m+1}$$ \tbinom{n+1}{m+1}
${n+1\brack m+1}$ $${n+1\brack m+1}$$ {n+1\brack m+1}
${n+1\brace m+1}$ $${n+1\brace m+1}$$ {n+1\brace m+1}

方框的用法和比较

渲染演示 Latex 语法
$\boxed{x^3+y^3=z^3}$ \boxed{x^3+y^3=z^3}
$\boxed{abcd 1234}$ \boxed{abcd 1234}
$\fbox{abcd 1234}$ \fbox{abcd 1234}

占位符phantom的用法和比较

渲染演示 Latex 语法
$\begin{array}{l} \text{Side Angle Side} \ \text{S} \hphantom {\text{ ide}} \text{A} \hphantom{\text{ngle }} \text{S}\end{array}$ \begin{array}{l} \text{Side Angle Side} \\ \text{S} \hphantom {\text{ ide}} \text{A} \hphantom{\text{ngle }} \text{S}\end{array}
$\begin{matrix}1&-1\ \phantom{}\1&\phantom{-}1\end{matrix}$ \begin{matrix}1&-1\\ \phantom{}\\1&\phantom{-}1\end{matrix}
$\dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c$ \dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c

空格

渲染演示 Latex 语法
$\alpha\quad\beta$ \alpha\quad\beta
$\alpha\qquad\beta$ \alpha\qquad\beta

其余未分类符号

渲染演示 Latex 语法
$\leftthreetimes,\rightthreetimes$ \leftthreetimes,\rightthreetimes
$\coprod,\amalg$ \coprod,\amalg
$\sup$ \sup
$\arg$ \arg
$\deg$ \deg
$\dim$ \dim
$\hom$ \hom
$\ker$ \ker
$\Pr$ \Pr
$\det$ \det
$\ltimes\rtimes,\bowtie,\Join$ \ltimes\rtimes,\bowtie,\Join
$$,%,&,_$ \$,\%,\&,\_

\substack

用于在编写大型运算符的条件时分行。

1
\sum_{\substack{1\lt i\lt 3 \\1\le j\lt 5}}a_{ij}

$$
\sum_{\substack{1\lt i\lt 3 \1\le j\lt 5}}a_{ij}
$$

自定义运算符

用\DeclareMathOperator定义运算符

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\DeclareMathOperator{\lcm}{lcm} \lcm(4,6)=2
\lcm(12,18)=24

$\DeclareMathOperator{\lcm}{lcm} \lcm(4,6)=2$
$\lcm(12,18)=24$

\buildrel{} \over{}

用于自创运算符，这个运算符拥有两行。

1
\buildrel{\rm def} \over{:=}

$$
\buildrel{\rm def} \over{:=}
$$

\begin ... \end

aligned

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\begin{aligned}
    3x - 4y &= 5 \\
    x + 7 &= -2y
\end{aligned}
\tag{3.1c}

$$
\begin{aligned}
3x - 4y &= 5 \
x + 7 &= -2y
\end{aligned}
\tag{3.1c}
$$

align

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\begin{align}
(a+b)
    ^2 &= (a+b)(a+b)          \tag{1}  \\
    &= a^2 + ab + ba + b^2 \tag{2}  \\
    &= a^2 + 2ab + b^2     \tag{3}
\end{align}

$$
\begin{align}
(a+b)^2 &= (a+b)(a+b) \tag{1} \
&= a^2 + ab + ba + b^2 \tag{2} \
&= a^2 + 2ab + b^2 \tag{3}
\end{align}
$$

array

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\begin{array}{lc|r}
    aaa & bbb & ccc \\
    d   & e   & f
\end{array}

$$
\begin{array}{lc|r}
aaa & bbb & ccc\
d & e & f
\end{array}
$$

cases

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|x| =
\begin{cases}
    x  & \text{ if } x\ge 0 \\
    -x & \text{ if } x \lt 0
\end{cases}$$

$$
|x| =
\begin{cases}
x & \text{ if } x\ge 0 \
-x & \text{ if } x \lt 0
\end{cases}
$$

Bmatrix

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\begin{Bmatrix}
    a & b\\ c & d
\end{Bmatrix}

$$
\begin{Bmatrix} a & b\ c & d\end{Bmatrix}
$$

bmatrix

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\begin{bmatrix}
    a & b\\ c & d
\end{bmatrix}

$$
\begin{bmatrix} a & b\ c & d\end{bmatrix}
$$

matrix

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\begin{matrix}
    a & b\\ c & d
\end{matrix}

$$
\begin{matrix} a & b\ c & d\end{matrix}
$$

pmatrix

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\begin{pmatrix}
    a & b\\ c & d
\end{pmatrix}

$$
\begin{pmatrix} a & b\ c & d\end{pmatrix}
$$

vmatrix

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\begin{vmatrix}
    a & b\\ c & d
\end{vmatrix}

$$
\begin{vmatrix} a & b\ c & d\end{vmatrix}
$$

Vmatrix

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\begin{Vmatrix}
    a & b\\ c & d
\end{Vmatrix}

$$
\begin{Vmatrix} a & b\ c & d\end{Vmatrix}
$$

eqnarray

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\begin{eqnarray}
(x-1)
    ^2 &=& (x-1)(x-1)      &=&  x^2-2x + 1 \\
    (x-1)^3 &=& (x-1)(x-1)(x-1) &=&  (x-1)^2(x-1)
\end{eqnarray}

$$
\begin{eqnarray}
(x-1)^2 &=& (x-1)(x-1) &=& x^2-2x + 1 \
(x-1)^3 &=& (x-1)(x-1)(x-1) &=& (x-1)^2(x-1)
\end{eqnarray}
$$

其它

\tag

\tag可以用来给公式编号，默认为右编号。只有某些情况下才可以使用，如 \aligned 不可以，\align 可以。

渲染演示 Latex 语法
$$\begin{align}(a+b)^2 &= (a+b)(a+b) \tag{1} \ &= a^2 + ab + ba + b^2 \tag{2} \ &= a^2 + 2ab + b^2 \tag{3} \end{align}$$ \begin{align}(a+b)^2 &= (a+b)(a+b) \tag{1} \\ &= a^2 + ab + ba + b^2 \tag{2} \\ &= a^2 + 2ab + b^2 \tag{3} \end{align}

\hline, \hdashline

用于在矩阵中画横线，\hline 为实线，\hdashline 为虚线。

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\begin{matrix}
    \hline
    x_{11} & x_{12} \\
    x_{21} & x_{22} \\
    \hdashline
    x_{31} & x_{32}
\end{matrix}

$$
\begin{matrix}
\hline
x_{11} & x_{12} \
x_{21} & x_{22} \
\hdashline
x_{31} & x_{32}
\end{matrix}
$$

\left, \right 和 \big

根据括号内的公式高度，智能调整两侧括号的高度，一个 \left 必须和一个 \right 匹配。如果只想要其中一个，那么用 \right.
来代替。

渲染演示 Latex 语法
$$\left(1+2\right)=\left(\dfrac{1}{2}\right)$$ \left(1+2\right)=\left(\dfrac{1}{2}\right)
$$\left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup$$ \left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup
$$\left[1+2\right]=\left[\dfrac{1}{2}\right]$$ \left[1+2\right]=\left[\dfrac{1}{2}\right]
$$\left{1+2\right}=\left{\dfrac{1}{2}\right}$$ \left\{1+2\right\}=\left\{\dfrac{1}{2}\right\}
$$\left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow$$ \left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow
$$\left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow$$ \left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow
$$ \left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow$$ \left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow
$$\left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert$$ \left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert
$$\left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert$$ \left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert
$$\left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert$$ \left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert
$$\left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil$$ \left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil
$$\left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor$$ \left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor
$$\left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash$$ \left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash
$$\left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache$$ \left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache

也可以自行直接指定大小：

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\Bigg[\bigg[\Big[\big[ [

$$
\Bigg[\bigg[\Big[\big[ [
$$

\not

在任何一个关系运算符前面添加一个 \not，即可得到划斜线的运算符，如

渲染演示 Latex 语法
$\not\equiv$ \not\equiv
$\not=$ \not=
$\not\in$ \not\in