KaTeX 数学公式大全

编者按：KaTeX 是一款基于 Donald Knuth 的 TeX 系统构建的高性能网页数学排版引擎，能够为数学公式与物理符号提供细致而快速的渲染效果。笔者日常深度使用 Obsidian，该笔记软件原生支持 KaTeX，故特此翻译并整理本文，旨在系统介绍 KaTeX 所支持的 TeX 语法。本文译自官方函数列表文档。

这是 KaTeX 支持的 TeX 函数列表，按逻辑分组排序。

重音符号¶


$a'$ `a'`	$\tilde{a}$ `\tilde{a}`	$\mathring{g}$ `\mathring{g}`
$a''$ `a''`	$\widetilde{ac}$ `\widetilde{ac}`	$\overgroup{AB}$ `\overgroup{AB}`
$a^{\prime}$ `a^{\prime}`	$\utilde{AB}$ `\utilde{AB}`	$\undergroup{AB}$ `\undergroup{AB}`
$\acute{a}$ `\acute{a}`	$\vec{F}$ `\vec{F}`	$\Overrightarrow{AB}$ `\Overrightarrow{AB}`
$\bar{y}$ `\bar{y}`	$\overleftarrow{AB}$ `\overleftarrow{AB}`	$\overrightarrow{AB}$ `\overrightarrow{AB}`
$\breve{a}$ `\breve{a}`	$\underleftarrow{AB}$ `\underleftarrow{AB}`	$\underrightarrow{AB}$ `\underrightarrow{AB}`
$\check{a}$ `\check{a}`	$\overleftharpoon{ac}$ `\overleftharpoon{ac}`	$\overrightharpoon{ac}$ `\overrightharpoon{ac}`
$\dot{a}$ `\dot{a}`	$\overleftrightarrow{AB}$ `\overleftrightarrow{AB}`	$\overbrace{AB}$ `\overbrace{AB}`
$\ddot{a}$ `\ddot{a}`	$\underleftrightarrow{AB}$ `\underleftrightarrow{AB}`	$\underbrace{AB}$ `\underbrace{AB}`
$\dddot{a}$ `\dddot{a}`	$\overline{AB}$ `\overline{AB}`	$\overbracket{AB}$ `\overbracket{AB}`
$\ddddot{a}$ `\ddddot{a}`	$\underline{AB}$ `\underline{AB}`	$\underbracket{AB}$ `\underbracket{AB}`
$\grave{a}$ `\grave{a}`	$\underbar{X}$ `\underbar{X}`	$\overlinesegment{AB}$ `\overlinesegment{AB}`
$\hat{\theta}$ `\hat{\theta}`	$\widecheck{ac}$ `\widecheck{ac}`	$\underlinesegment{AB}$ `\underlinesegment{AB}`
	$\widehat{ac}$ `\widehat{ac}`

在 \text{…} 内部使用的重音函数


$\text{\'{a}}$ `\'{a}`	$\text{\~{a}}$ `\~{a}`	$\text{\.{a}}$ `\.{a}`	$\text{\H{a}}$ `\H{a}`
$\text{\`{a}}$ \{a}</code>\|$\text{\={a}}$={a}\|$\text{\"{a}}$\"{a}\|$\text{\v{a}}$\v{a}`
$\text{\^{a}}$ `\^{a}`	$\text{\u{a}}$ `\u{a}`	$\text{\r{a}}$ `\r{a}`

另请参阅字母与 Unicode。

定界符¶


$(~)$ `( )`	$\lparen~\rparen$ `\lparen` $~~~~$`\rparen`	$⌈~⌉$ `⌈ ⌉`	$\lceil~\rceil$ `\lceil` $~~~~~$`\rceil`	$\uparrow$ `\uparrow`
$[~]$ `[ ]`	$\lbrack~\rbrack$ `\lbrack` $~~~~$`\rbrack`	$⌊~⌋$ `⌊ ⌋`	$\lfloor~\rfloor$ `\lfloor` $~~~~~$`\rfloor`	$\downarrow$ `\downarrow`
$\{ \}$ `\{ \}`	$\lbrace \rbrace$ `\lbrace` $~~~~$`\rbrace`	$⎰⎱$ `⎰⎱`	$\lmoustache \rmoustache$ `\lmoustache` $~~~~$`\rmoustache`	$\updownarrow$ `\updownarrow`
$⟨~⟩$ `⟨ ⟩`	$\langle~\rangle$ `\langle` $~~~~$`\rangle`	$⟮~⟯$ `⟮ ⟯`	$\lgroup~\rgroup$ `\lgroup` $~~~~~$`\rgroup`	$\Uparrow$ `\Uparrow`
$\vert$ `\|`	$\vert$ `\vert`	$┌ ┐$ `┌ ┐`	$\ulcorner \urcorner$ `\ulcorner` $~~~~$`\urcorner`	$\Downarrow$ `\Downarrow`
$\Vert$ `\\|`	$\Vert$ `\Vert`	$└ ┘$ `└ ┘`	$\llcorner \lrcorner$ `\llcorner` $~~~~$`\lrcorner`	$\Updownarrow$ `\Updownarrow`
$\lvert~\rvert$ `\lvert` $~~~~$`\rvert`	$\lVert~\rVert$ `\lVert` $~~~~~$`\rVert`	`\left.`	`\right.`	$\backslash$ `\backslash`
$\lang~\rang$ `\lang` $~~~~$`\rang`	$\left\lt~\right\gt$ `\lt \gt`	$⟦~⟧$ `⟦ ⟧`	$\llbracket~\rrbracket$ `\llbracket` $~~~~$`\rrbracket`	$/$ `/`
$\lBrace~\rBrace$ `\lBrace \rBrace`

定界符尺寸调整

$\left(\LARGE{AB}\right)$ \left(\LARGE{AB}\right)

$( \big( \Big( \bigg( \Bigg($ ( \big( \Big( \bigg( \Bigg(


`\left`	`\big`	`\bigl`	`\bigm`	`\bigr`
`\middle`	`\Big`	`\Bigl`	`\Bigm`	`\Bigr`
`\right`	`\bigg`	`\biggl`	`\biggm`	`\biggr`
	`\Bigg`	`\Biggl`	`\Biggm`	`\Biggr`

环境¶


$\begin{matrix} a & b \\ c & d \end{matrix}$	`\begin{matrix}` `a & b \\` `c & d` `\end{matrix}`	$\begin{array}{cc}a & b\\c & d\end{array}$	`\begin{array}{cc}` `a & b \\` `c & d` `\end{array}`
$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$	`\begin{pmatrix}` `a & b \\` `c & d` `\end{pmatrix}`	$\begin{bmatrix} a & b \\ c & d \end{bmatrix}$	`\begin{bmatrix}` `a & b \\` `c & d` `\end{bmatrix}`
$\begin{vmatrix} a & b \\ c & d \end{vmatrix}$	`\begin{vmatrix}` `a & b \\` `c & d` `\end{vmatrix}`	$\begin{Vmatrix} a & b \\ c & d \end{Vmatrix}$	`\begin{Vmatrix}` `a & b \\` `c & d` `\end{Vmatrix}`
$\begin{Bmatrix} a & b \\ c & d \end{Bmatrix}$	`\begin{Bmatrix}` `a & b \\` `c & d` `\end{Bmatrix}`	$\def\arraystretch{1.5}\begin{array}{c:c:c} a & b & c \\ \hline d & e & f \\ \hdashline g & h & i \end{array}$	`\def\arraystretch{1.5}` `\begin{array}{c:c:c}` `a & b & c \\ \hline` `d & e & f \\` `\hdashline` `g & h & i` `\end{array}`
$x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$	`x = \begin{cases}` `a &\text{if } b \\` `c &\text{if } d` `\end{cases}`	$\begin{rcases} a &\text{if } b \\ c &\text{if } d \end{rcases}⇒…$	`\begin{rcases}` `a &\text{if } b \\` `c &\text{if } d` `\end{rcases}⇒…`
$\begin{smallmatrix} a & b \\ c & d \end{smallmatrix}$	`\begin{smallmatrix}` `a & b \\` `c & d` `\end{smallmatrix}`	$$\sum_{\begin{subarray}{l} i\in\Lambda\\ 0<j<n\end{subarray}}$$	`\sum_{` `\begin{subarray}{l}` `i\in\Lambda\\` `0<j<n` `\end{subarray}}`

自动渲染（auto-render）扩展会渲染以下环境，即使它们没有被包在 $$…$$ 之类的数学定界符内。这些环境仅支持显示（display）模式。


$$\begin{equation}\begin{split}a &=b+c\\&=e+f\end{split}\end{equation}$$	`\begin{equation}` `\begin{split}` `a &=b+c\\` `&=e+f` `\end{split}` `\end{equation}`	$$\begin{align} a&=b+c \\ d+e&=f \end{align}$$	`\begin{align}` `a&=b+c \\` `d+e&=f` `\end{align}`
$$\begin{gather} a=b \\ e=b+c \end{gather}$$	`\begin{gather}` `a=b \\` `e=b+c` `\end{gather}`	$$\begin{alignat}{2}10&x+&3&y=2\\3&x+&13&y=4\end{alignat}$$	`\begin{alignat}{2}` `10&x+&3&y=2\\` `3&x+&13&y=4` `\end{alignat}`
$$\begin{CD}A @>a>> B \\@VbVV @AAcA\\C @= D\end{CD}$$	`\begin{CD}` `A @>a>> B \\` `@VbVV @AAcA \\` `C @= D` `\end{CD}`

其他 KaTeX 环境¶

环境	与上面所示环境的区别
`darray`、`dcases`、`drcases`	…… 应用 `displaystyle`
`matrix`、`pmatrix`、`bmatrix` `Bmatrix`、`vmatrix`、`Vmatrix`	…… 接受一个可选参数来设置列对齐方式，如 `\begin{matrix*}[r]`
`equation`、`gather` `align`、`alignat`	…… 没有自动编号。另外，你也可以使用 `\nonumber` 或 `\notag` 来取消公式中某一行的编号。
`gathered`、`aligned`、`alignedat`	…… 不需要处于显示模式。 …… 没有自动编号。 …… 必须放在数学定界符内，才能被自动渲染扩展渲染。

可接受的换行符包括：\\、\cr、\\[distance] 和 \cr[distance]。distance（距离）可以使用任意 KaTeX 单位来书写。

{array} 环境支持 | 和 : 两种竖直分隔线。

{array} 环境尚不支持 \cline 或 \multicolumn。

\tag 可以应用于顶层环境（align、align*、alignat、alignat*、gather、gather*）中的单独一行。

HTML¶

以下“原始 HTML”功能对于不可信的输入存在潜在危险，因此默认处于禁用状态，尝试使用它们会以红色显示命令名（可通过 errorColor 选项配置）。如果你完全信任你的 LaTeX 输入，可以传入 trust: true 选项；你也可以通过 trust 选项只启用部分命令，或只对部分 URL 启用。


$\href{https://katex.org/}{\KaTeX}$	`\href{https://katex.org/}{\KaTeX}`
$\url{https://katex.org/}$	`\url{https://katex.org/}`
$\includegraphics[height=0.8em, totalheight=0.9em, width=0.9em, alt=KA logo]{https://katex.org/img/khan-academy.png}$	`\includegraphics[height=0.8em, totalheight=0.9em, width=0.9em, alt=KA logo]{https://katex.org/img/khan-academy.png}`
$\htmlId{bar}{x}$ `…<span id="bar" class="enclosing">…x…</span>…`	`\htmlId{bar}{x}`
$\htmlClass{foo}{x}$ `…<span class="enclosing foo">…x…</span>…`	`\htmlClass{foo}{x}`
$\htmlStyle{color: red;}{x}$ `…<span style="color: red;" class="enclosing">…x…</span>…`	`\htmlStyle{color: red;}{x}`
$\htmlData{foo=a, bar=b}{x}$ `…<span data-foo="a" data-bar="b" class="enclosing">…x…</span>…`	`\htmlData{foo=a, bar=b}{x}`

\includegraphics 的第一个参数支持 height、width、totalheight 和 alt。其中 height 是必需的。

HTML 扩展（以 \html 开头的）命令是非标准的，因此需要将 htmlExtension 的 strict 选项放宽。

字母与 Unicode¶

希腊字母

直接输入：$Α Β Γ Δ Ε Ζ Η Θ Ι \allowbreak Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω$ $\allowbreak α β γ δ ϵ ζ η θ ι κ λ μ ν ξ o π \allowbreak ρ σ τ υ ϕ χ ψ ω ε ϑ ϖ ϱ ς φ ϝ$


$\Alpha$ `\Alpha`	$\Beta$ `\Beta`	$\Gamma$ `\Gamma`	$\Delta$ `\Delta`
$\Epsilon$ `\Epsilon`	$\Zeta$ `\Zeta`	$\Eta$ `\Eta`	$\Theta$ `\Theta`
$\Iota$ `\Iota`	$\Kappa$ `\Kappa`	$\Lambda$ `\Lambda`	$\Mu$ `\Mu`
$\Nu$ `\Nu`	$\Xi$ `\Xi`	$\Omicron$ `\Omicron`	$\Pi$ `\Pi`
$\Rho$ `\Rho`	$\Sigma$ `\Sigma`	$\Tau$ `\Tau`	$\Upsilon$ `\Upsilon`
$\Phi$ `\Phi`	$\Chi$ `\Chi`	$\Psi$ `\Psi`	$\Omega$ `\Omega`
$\varGamma$ `\varGamma`	$\varDelta$ `\varDelta`	$\varTheta$ `\varTheta`	$\varLambda$ `\varLambda`
$\varXi$ `\varXi`	$\varPi$ `\varPi`	$\varSigma$ `\varSigma`	$\varUpsilon$ `\varUpsilon`
$\varPhi$ `\varPhi`	$\varPsi$ `\varPsi`	$\varOmega$ `\varOmega`
$\alpha$ `\alpha`	$\beta$ `\beta`	$\gamma$ `\gamma`	$\delta$ `\delta`
$\epsilon$ `\epsilon`	$\zeta$ `\zeta`	$\eta$ `\eta`	$\theta$ `\theta`
$\iota$ `\iota`	$\kappa$ `\kappa`	$\lambda$ `\lambda`	$\mu$ `\mu`
$\nu$ `\nu`	$\xi$ `\xi`	$\omicron$ `\omicron`	$\pi$ `\pi`
$\rho$ `\rho`	$\sigma$ `\sigma`	$\tau$ `\tau`	$\upsilon$ `\upsilon`
$\phi$ `\phi`	$\chi$ `\chi`	$\psi$ `\psi`	$\omega$ `\omega`
$\varepsilon$ `\varepsilon`	$\varkappa$ `\varkappa`	$\vartheta$ `\vartheta`	$\thetasym$ `\thetasym`
$\varpi$ `\varpi`	$\varrho$ `\varrho`	$\varsigma$ `\varsigma`	$\varphi$ `\varphi`
$\digamma $ `\digamma`

其他字母


$\imath$ `\imath`	$\nabla$ `\nabla`	$\Im$ `\Im`	$\Reals$ `\Reals`	$\text{\OE}$ `\text{\OE}`
$\jmath$ `\jmath`	$\partial$ `\partial`	$\image$ `\image`	$\wp$ `\wp`	$\text{\o}$ `\text{\o}`
$\aleph$ `\aleph`	$\Game$ `\Game`	$\Bbbk$ `\Bbbk`	$\weierp$ `\weierp`	$\text{\O}$ `\text{\O}`
$\alef$ `\alef`	$\Finv$ `\Finv`	$\N$ `\N`	$\Z$ `\Z`	$\text{\ss}$ `\text{\ss}`
$\alefsym$ `\alefsym`	$\cnums$ `\cnums`	$\natnums$ `\natnums`	$\text{\aa}$ `\text{\aa}`	$\text{\i}$ `\text{\i}`
$\beth$ `\beth`	$\Complex$ `\Complex`	$\R$ `\R`	$\text{\AA}$ `\text{\AA}`	$\text{\j}$ `\text{\j}`
$\gimel$ `\gimel`	$\ell$ `\ell`	$\Re$ `\Re`	$\text{\ae}$ `\text{\ae}`
$\daleth$ `\daleth`	$\hbar$ `\hbar`	$\real$ `\real`	$\text{\AE}$ `\text{\AE}`
$\eth$ `\eth`	$\hslash$ `\hslash`	$\reals$ `\reals`	$\text{\oe}$ `\text{\oe}`

直接输入：$∂ ∇ ℑ Ⅎ ℵ ℶ ℷ ℸ ⅁ ℏ ð − ∗$ ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖÙÚÛÜÝÞßàáâãäåçèéêëìíîïðñòóôöùúûüýþÿ ₊₋₌₍₎₀₁₂₃₄₅₆₇₈₉ₐₑₕᵢⱼₖₗₘₙₒₚᵣₛₜᵤᵥₓᵦᵧᵨᵩᵪ⁺⁻⁼⁽⁾⁰¹²³⁴⁵⁶⁷⁸⁹ᵃᵇᶜᵈᵉᵍʰⁱʲᵏˡᵐⁿᵒᵖʳˢᵗᵘʷˣʸᶻᵛᵝᵞᵟᵠᵡ

数学模式下的 Unicode 上下标字符，其渲染效果与你写成普通字符的下标或上标完全相同。例如，A²⁺³ 的渲染效果与 A^{2+3} 一致。

波斯语/阿拉伯语数字 如需波斯语/阿拉伯语数字的支持，可以尝试第三方插件 persian-katex-plugin。

Unicode 数学字母数字符号

项目	范围	项目	范围
粗体	$\text{𝐀-𝐙 𝐚-𝐳 𝟎-𝟗}$	双线体	$\text{𝔸-}ℤ\ 𝕜$
斜体	$\text{𝐴-𝑍 𝑎-𝑧}$	无衬线体	$\text{𝖠-𝖹 𝖺-𝗓 𝟢-𝟫}$
粗斜体	$\text{𝑨-𝒁 𝒂-𝒛}$	无衬线粗体	$\text{𝗔-𝗭 𝗮-𝘇 𝟬-𝟵}$
手写体	$\text{𝒜-𝒵}$	无衬线斜体	$\text{𝘈-𝘡 𝘢-𝘻}$
德文尖角体	$\text{$𝔄$-$ℨ$}\text{ $𝔞$-$𝔷$}$	等宽体	$\text{𝙰-𝚉 𝚊-𝚣 𝟶-𝟿}$
德文尖角粗体	$\text{𝕬-𝖅 𝖆-𝖟}$

Unicode

上面列出的字母在任何 KaTeX 渲染模式下都能正常显示。

此外，亚美尼亚文、婆罗米系文字、格鲁吉亚文、中文、日文和韩文的字形在文本模式下始终可用。不过，这些字形会使用系统字体（而非 KaTeX 自带字体）渲染，因此排版风格可能不一致。你可以为 CSS 类 .latin_fallback、.cyrillic_fallback、.brahmic_fallback、.georgian_fallback、.cjk_fallback 和 .hangul_fallback 提供规则，为这些语言指定后备字体。使用这些字形可能造成轻微的垂直对齐问题：KaTeX 对列出的符号以及大多数拉丁、希腊和西里尔字母有详细的度量信息，但其他可用字形会被当作与当前 KaTeX 字体中字母 M 等高来处理。

如果 KaTeX 渲染模式设置为 strict: false 或 strict: "warn"（默认值），那么 KaTeX 会在文本模式和数学模式下接受所有 Unicode 字母。所有无法识别的字符都会被当作出现在文本模式中处理，同样存在使用系统字体以及垂直对齐可能不正确的问题。

对于波斯语复合字符，一个用户提供的插件正在开发中。

任何字符都可以通过 \char 函数加上十六进制的 Unicode 编码来书写。例如 \char"263a 会渲染为 $\char"263a$。

布局¶

标注¶


$\cancel{5}$ `\cancel{5}`	$\overbrace{a+b+c}^{\text{note}}$ `\overbrace{a+b+c}^{\text{note}}`
$\bcancel{5}$ `\bcancel{5}`	$\underbrace{a+b+c}_{\text{note}}$ `\underbrace{a+b+c}_{\text{note}}`
$\xcancel{ABC}$ `\xcancel{ABC}`	$\not =$ `\not =`
$\text{\sout{abc}}$ `\text{\sout{abc}}`	$\boxed{\pi=\frac c d}$ `\boxed{\pi=\frac c d}`
$a_{\angl n}$ `$a_{\angl n}`	$a_\angln$ `a_\angln`
$\overbracket{a+b+c}^{\text{note}}$ `\overbracket{a+b+c}^{\text{note}}`	$\underbracket{a+b+c}_{\text{note}}$ `\underbracket{a+b+c}_{\text{note}}`
$\phase{-78^\circ}$`\phase{-78^\circ}`

\tag{hi} x+y^{2x} $$\tag{hi} x+y^{2x}$$

\tag*{hi} x+y^{2x} $$\tag*{hi} x+y^{2x}$$

换行¶

KaTeX 0.10.0+ 会在行内数学中，在 “=” 或 “+” 之类的关系符或二元运算符之后自动插入换行。可以通过 \nobreak 或将数学内容放入一对花括号中（如 {F=ma}）来抑制这种自动换行。\allowbreak 则允许在关系符或运算符之外的位置自动换行。

硬换行是 \\ 和 \newline。

在显示数学中，KaTeX 不会插入自动换行。当渲染选项为 strict: true 时，它会忽略显示数学中的硬换行。

垂直布局¶


$x_n$ `x_n`	$\stackrel{!}{=}$ `\stackrel{!}{=}`	$a \atop b$ `a \atop b`
$e^x$ `e^x`	$\overset{!}{=}$ `\overset{!}{=}`	$a\raisebox{0.25em}{$b$}c$ `a\raisebox{0.25em}{$b$}c`
$_u^o $ `_u^o`	$\underset{!}{=}$ `\underset{!}{=}`	$a+\left(\vcenter{\frac{\frac a b}c}\right)$ `a+\left(\vcenter{\hbox{$\frac{\frac a b}c$}}\right)`
		$$\sum_{\substack{0<i<m\\0<j<n}}$$ `\sum_{\substack{0<i<m\\0<j<n}}`

\raisebox 和 \hbox 会将其参数置于文本模式。若要抬升数学内容，需如上文所示在参数内嵌套 $…$ 定界符。

如果 strict 渲染选项为 false，\vcenter 可以不用 \hbox 书写。此时可省略嵌套的 $…$ 定界符。

重叠与间距¶


${=}\mathllap{/\,}$ `{=}\mathllap{/\,}`	$\left(x^{\smash{2}}\right)$ `\left(x^{\smash{2}}\right)`
$\mathrlap{\,/}{=}$ `\mathrlap{\,/}{=}`	$\sqrt{\smash[b]{y}}$ `\sqrt{\smash[b]{y}}`

$\displaystyle\sum_{\mathclap{1\le i\le j\le n}} x_{ij}$ \sum_{\mathclap{1\le i\le j\le n}} x_{ij}

KaTeX 还支持 \llap、\rlap 和 \clap，但它们只接受文本参数，不接受数学参数。

间距

函数	效果	函数	效果
`\,`	³∕₁₈ em 间距	`\kern{distance}`	间距，宽度 = distance
`\thinspace`	³∕₁₈ em 间距	`\mkern{distance}`	间距，宽度 = distance
`\>`	⁴∕₁₈ em 间距	`\mskip{distance}`	间距，宽度 = distance
`\:`	⁴∕₁₈ em 间距	`\hskip{distance}`	间距，宽度 = distance
`\medspace`	⁴∕₁₈ em 间距	`\hspace{distance}`	间距，宽度 = distance
`\;`	⁵∕₁₈ em 间距	`\hspace*{distance}`	间距，宽度 = distance
`\thickspace`	⁵∕₁₈ em 间距	`\phantom{content}`	与 content 宽高相同的空白
`\enspace`	½ em 间距	`\hphantom{content}`	与 content 同宽的空白
`\quad`	1 em 间距	`\vphantom{content}`	与 content 同高的撑杆（strut）
`\qquad`	2 em 间距	`\!`	– ³∕₁₈ em 间距
`~`	不换行空格	`\negthinspace`	– ³∕₁₈ em 间距
`\<空格>`	空格	`\negmedspace`	– ⁴∕₁₈ em 间距
`\nobreakspace`	不换行空格	`\negthickspace`	– ⁵∕₁₈ em 间距
`\space`	空格	`\mathstrut`	`\vphantom{(}`

说明：

distance 接受任意 KaTeX 单位。

\kern、\mkern、\mskip 和 \hspace 接受不带花括号的距离值，如 \kern1em。

\mkern 和 \mskip 在文本模式下无效，且对于除 mu 以外的任何单位都会在控制台输出警告。

逻辑与集合论¶

$\gdef\VERT{|}$


$\forall$ `\forall`	$\complement$ `\complement`	$\therefore$ `\therefore`	$\emptyset$ `\emptyset`
$\exists$ `\exists`	$\subset$ `\subset`	$\because$ `\because`	$\empty$ `\empty`
$\exist$ `\exist`	$\supset$ `\supset`	$\mapsto$ `\mapsto`	$\varnothing$ `\varnothing`
$\nexists$ `\nexists`	$\mid$ `\mid`	$\to$ `\to`	$\implies$ `\implies`
$\in$ `\in`	$\land$ `\land`	$\gets$ `\gets`	$\impliedby$ `\impliedby`
$\isin$ `\isin`	$\lor$ `\lor`	$\leftrightarrow$ `\leftrightarrow`	$\iff$ `\iff`
$\notin$ `\notin`	$\ni$ `\ni`	$\notni$ `\notni`	$\neg$ `\neg` 或 `\lnot`
	$\Set{ x \VERT x<\frac 1 2 }$ `\Set{ x \| x<\frac 1 2 }`	$\set{x\VERT x<5}$ `\set{x\|x<5}`

直接输入：$∀ ∴ ∁ ∵ ∃ ∣ ∈ ∉ ∋ ⊂ ⊃ ∧ ∨ ↦ → ← ↔ ¬$ ℂ ℍ ℕ ℙ ℚ ℝ

宏¶


$\def\foo{x^2} \foo + \foo$	`\def\foo{x^2} \foo + \foo`
$\gdef\foo#1{#1^2} \foo{y} + \foo{y}$	`\gdef\foo#1{#1^2} \foo{y} + \foo{y}`
	`\edef\macroname#1#2…{definition to be expanded}`
	`\xdef\macroname#1#2…{definition to be expanded}`
	`\let\foo=\bar`
	`\futurelet\foo\bar x`
	`\global\def\macroname#1#2…{definition}`
	`\newcommand\macroname[numargs]{definition}`
	`\renewcommand\macroname[numargs]{definition}`
	`\providecommand\macroname[numargs]{definition}`

宏也可以在 KaTeX 的渲染选项中定义。

宏最多可接受九个参数：#1、#2 等。

由 \gdef、\xdef、\global\def、\global\edef、\global\let 和 \global\futurelet 定义的宏会在多个数学表达式之间持续生效。（例外情况：宏的持久化可能被禁用——这有正当的安全考虑。）

KaTeX 没有 \par，因此所有宏默认都是长宏（long），\long 会被忽略。

可用的函数包括：

\char \mathchoice \TextOrMath \@ifstar \@ifnextchar \@firstoftwo \@secondoftwo \relax \expandafter \noexpand

@ 是命令中的合法字符，就如同 \makeatletter 已生效一样。

运算符¶

大型运算符¶


$\sum$ `\sum`	$\prod$ `\prod`	$\bigotimes$ `\bigotimes`	$\bigvee$ `\bigvee`
$\int$ `\int`	$\coprod$ `\coprod`	$\bigoplus$ `\bigoplus`	$\bigwedge$ `\bigwedge`
$\iint$ `\iint`	$\intop$ `\intop`	$\bigodot$ `\bigodot`	$\bigcap$ `\bigcap`
$\iiint$ `\iiint`	$\smallint$ `\smallint`	$\biguplus$ `\biguplus`	$\bigcup$ `\bigcup`
$\oint$ `\oint`	$\oiint$ `\oiint`	$\oiiint$ `\oiiint`	$\bigsqcup$ `\bigsqcup`

直接输入：$∫ ∬ ∭ ∮ ∏ ∐ ∑ ⋀ ⋁ ⋂ ⋃ ⨀ ⨁ ⨂ ⨄ ⨆$ ∯ ∰

二元运算符¶


$+$ `+`	$\cdot$ `\cdot`	$\gtrdot$ `\gtrdot`	$x \pmod a$ `x \pmod a`
$-$ `-`	$\cdotp$ `\cdotp`	$\intercal$ `\intercal`	$x \pod a$ `x \pod a`
$/$ `/`	$\centerdot$ `\centerdot`	$\land$ `\land`	$\rhd$ `\rhd`
$$ ``	$\circ$ `\circ`	$\leftthreetimes$ `\leftthreetimes`	$\rightthreetimes$ `\rightthreetimes`
$\amalg$ `\amalg`	$\circledast$ `\circledast`	$\ldotp$ `\ldotp`	$\rtimes$ `\rtimes`
$\And$ `\And`	$\circledcirc$ `\circledcirc`	$\lor$ `\lor`	$\setminus$ `\setminus`
$\ast$ `\ast`	$\circleddash$ `\circleddash`	$\lessdot$ `\lessdot`	$\smallsetminus$ `\smallsetminus`
$\barwedge$ `\barwedge`	$\Cup$ `\Cup`	$\lhd$ `\lhd`	$\sqcap$ `\sqcap`
$\bigcirc$ `\bigcirc`	$\cup$ `\cup`	$\ltimes$ `\ltimes`	$\sqcup$ `\sqcup`
$\bmod$ `\bmod`	$\curlyvee$ `\curlyvee`	$x \mod a$ `x\mod a`	$\times$ `\times`
$\boxdot$ `\boxdot`	$\curlywedge$ `\curlywedge`	$\mp$ `\mp`	$\unlhd$ `\unlhd`
$\boxminus$ `\boxminus`	$\div$ `\div`	$\odot$ `\odot`	$\unrhd$ `\unrhd`
$\boxplus$ `\boxplus`	$\divideontimes$ `\divideontimes`	$\ominus$ `\ominus`	$\uplus$ `\uplus`
$\boxtimes$ `\boxtimes`	$\dotplus$ `\dotplus`	$\oplus$ `\oplus`	$\vee$ `\vee`
$\bullet$ `\bullet`	$\doublebarwedge$ `\doublebarwedge`	$\otimes$ `\otimes`	$\veebar$ `\veebar`
$\Cap$ `\Cap`	$\doublecap$ `\doublecap`	$\oslash$ `\oslash`	$\wedge$ `\wedge`
$\cap$ `\cap`	$\doublecup$ `\doublecup`	$\pm$ `\pm` 或 `\plusmn`	$\wr$ `\wr`

直接输入：$+ - / * ⋅ ∘ ∙ ± × ÷ ∓ ∔ ∧ ∨ ∩ ∪ ≀ ⊎ ⊓ ⊔ ⊕ ⊖ ⊗ ⊘ ⊙ ⊚ ⊛ ⊝ ◯ ∖ {}$

分数与二项式系数¶


$\frac{a}{b}$ `\frac{a}{b}`	$\tfrac{a}{b}$ `\tfrac{a}{b}`	$\genfrac ( ] {2pt}{1}a{a+1}$ `\genfrac ( ] {2pt}{1}a{a+1}`
${a \over b}$ `{a \over b}`	$\dfrac{a}{b}$ `\dfrac{a}{b}`	${a \above{2pt} b+1}$ `{a \above{2pt} b+1}`
$a/b$ `a/b`		$\cfrac{a}{1 + \cfrac{1}{b}}$ `\cfrac{a}{1 + \cfrac{1}{b}}`


$\binom{n}{k}$ `\binom{n}{k}`	$\dbinom{n}{k}$ `\dbinom{n}{k}`	${n\brace k}$ `{n\brace k}`
${n \choose k}$ `{n \choose k}`	$\tbinom{n}{k}$ `\tbinom{n}{k}`	${n\brack k}$ `{n\brack k}`

数学函数（运算符名）¶


$\arcsin$ `\arcsin`	$\cosec$ `\cosec`	$\deg$ `\deg`	$\sec$ `\sec`
$\arccos$ `\arccos`	$\cosh$ `\cosh`	$\dim$ `\dim`	$\sin$ `\sin`
$\arctan$ `\arctan`	$\cot$ `\cot`	$\exp$ `\exp`	$\sinh$ `\sinh`
$\arctg$ `\arctg`	$\cotg$ `\cotg`	$\hom$ `\hom`	$\sh$ `\sh`
$\arcctg$ `\arcctg`	$\coth$ `\coth`	$\ker$ `\ker`	$\tan$ `\tan`
$\arg$ `\arg`	$\csc$ `\csc`	$\lg$ `\lg`	$\tanh$ `\tanh`
$\ch$ `\ch`	$\ctg$ `\ctg`	$\ln$ `\ln`	$\tg$ `\tg`
$\cos$ `\cos`	$\cth$ `\cth`	$\log$ `\log`	$\th$ `\th`
$\operatorname{f}$ `\operatorname{f}`
$\argmax$ `\argmax`	$\injlim$ `\injlim`	$\min$ `\min`	$\varinjlim$ `\varinjlim`
$\argmin$ `\argmin`	$\lim$ `\lim`	$\plim$ `\plim`	$\varliminf$ `\varliminf`
$\det$ `\det`	$\liminf$ `\liminf`	$\Pr$ `\Pr`	$\varlimsup$ `\varlimsup`
$\gcd$ `\gcd`	$\limsup$ `\limsup`	$\projlim$ `\projlim`	$\varprojlim$ `\varprojlim`
$\inf$ `\inf`	$\max$ `\max`	$\sup$ `\sup`
$\operatorname{f}$ `\operatorname{f}`	$\operatornamewithlimits{f}$ `\operatornamewithlimits{f}`

本表中最后六行的函数可以搭配 \limits 使用。

\sqrt¶

$\sqrt{x}$ \sqrt{x}

$\sqrt[3]{x}$ \sqrt[3]{x}

关系符号¶

$\stackrel{!}{=}$ \stackrel{!}{=}


$=$ `=`	$\doteqdot$ `\doteqdot`	$\lessapprox$ `\lessapprox`	$\smile$ `\smile`
$<$ `<`	$\eqcirc$ `\eqcirc`	$\lesseqgtr$ `\lesseqgtr`	$\sqsubset$ `\sqsubset`
$>$ `>`	$\eqcolon$ `\eqcolon` 或 `\minuscolon`	$\lesseqqgtr$ `\lesseqqgtr`	$\sqsubseteq$ `\sqsubseteq`
$:$ `:`	$\Eqcolon$ `\Eqcolon` 或 `\minuscoloncolon`	$\lessgtr$ `\lessgtr`	$\sqsupset$ `\sqsupset`
$\approx$ `\approx`	$\eqqcolon$ `\eqqcolon` 或 `\equalscolon`	$\lesssim$ `\lesssim`	$\sqsupseteq$ `\sqsupseteq`
$\approxcolon$ `\approxcolon`	$\Eqqcolon$ `\Eqqcolon` 或 `\equalscoloncolon`	$\ll$ `\ll`	$\Subset$ `\Subset`
$\approxcoloncolon$ `\approxcoloncolon`	$\eqsim$ `\eqsim`	$\lll$ `\lll`	$\subset$ `\subset` 或 `\sub`
$\approxeq$ `\approxeq`	$\eqslantgtr$ `\eqslantgtr`	$\llless$ `\llless`	$\subseteq$ `\subseteq` 或 `\sube`
$\asymp$ `\asymp`	$\eqslantless$ `\eqslantless`	$\lt$ `\lt`	$\subseteqq$ `\subseteqq`
$\backepsilon$ `\backepsilon`	$\equiv$ `\equiv`	$\mid$ `\mid`	$\succ$ `\succ`
$\backsim$ `\backsim`	$\fallingdotseq$ `\fallingdotseq`	$\models$ `\models`	$\succapprox$ `\succapprox`
$\backsimeq$ `\backsimeq`	$\frown$ `\frown`	$\multimap$ `\multimap`	$\succcurlyeq$ `\succcurlyeq`
$\between$ `\between`	$\ge$ `\ge`	$\origof$ `\origof`	$\succeq$ `\succeq`
$\bowtie$ `\bowtie`	$\geq$ `\geq`	$\owns$ `\owns`	$\succsim$ `\succsim`
$\bumpeq$ `\bumpeq`	$\geqq$ `\geqq`	$\parallel$ `\parallel`	$\Supset$ `\Supset`
$\Bumpeq$ `\Bumpeq`	$\geqslant$ `\geqslant`	$\perp$ `\perp`	$\supset$ `\supset`
$\circeq$ `\circeq`	$\gg$ `\gg`	$\pitchfork$ `\pitchfork`	$\supseteq$ `\supseteq` 或 `\supe`
$\colonapprox$ `\colonapprox`	$\ggg$ `\ggg`	$\prec$ `\prec`	$\supseteqq$ `\supseteqq`
$\Colonapprox$ `\Colonapprox` 或 `\coloncolonapprox`	$\gggtr$ `\gggtr`	$\precapprox$ `\precapprox`	$\thickapprox$ `\thickapprox`
$\coloneq$ `\coloneq` 或 `\colonminus`	$\gt$ `\gt`	$\preccurlyeq$ `\preccurlyeq`	$\thicksim$ `\thicksim`
$\Coloneq$ `\Coloneq` 或 `\coloncolonminus`	$\gtrapprox$ `\gtrapprox`	$\preceq$ `\preceq`	$\trianglelefteq$ `\trianglelefteq`
$\coloneqq$ `\coloneqq` 或 `\colonequals`	$\gtreqless$ `\gtreqless`	$\precsim$ `\precsim`	$\triangleq$ `\triangleq`
$\Coloneqq$ `\Coloneqq` 或 `\coloncolonequals`	$\gtreqqless$ `\gtreqqless`	$\propto$ `\propto`	$\trianglerighteq$ `\trianglerighteq`
$\colonsim$ `\colonsim`	$\gtrless$ `\gtrless`	$\risingdotseq$ `\risingdotseq`	$\varpropto$ `\varpropto`
$\Colonsim$ `\Colonsim` 或 `\coloncolonsim`	$\gtrsim$ `\gtrsim`	$\shortmid$ `\shortmid`	$\vartriangle$ `\vartriangle`
$\cong$ `\cong`	$\imageof$ `\imageof`	$\shortparallel$ `\shortparallel`	$\vartriangleleft$ `\vartriangleleft`
$\curlyeqprec$ `\curlyeqprec`	$\in$ `\in` 或 `\isin`	$\sim$ `\sim`	$\vartriangleright$ `\vartriangleright`
$\curlyeqsucc$ `\curlyeqsucc`	$\Join$ `\Join`	$\simcolon$ `\simcolon`	$\vcentcolon$ `\vcentcolon` 或 `\ratio`
$\dashv$ `\dashv`	$\le$ `\le`	$\simcoloncolon$ `\simcoloncolon`	$\vdash$ `\vdash`
$\dblcolon$ `\dblcolon` 或 `\coloncolon`	$\leq$ `\leq`	$\simeq$ `\simeq`	$\vDash$ `\vDash`
$\doteq$ `\doteq`	$\leqq$ `\leqq`	$\smallfrown$ `\smallfrown`	$\Vdash$ `\Vdash`
$\Doteq$ `\Doteq`	$\leqslant$ `\leqslant`	$\smallsmile$ `\smallsmile`	$\Vvdash$ `\Vvdash`

直接输入：$= < > : ∈ ∋ ∝ ∼ ∽ ≂ ≃ ≅ ≈ ≊ ≍ ≎ ≏ ≐ ≑ ≒ ≓ ≖ ≗ ≜ ≡ ≤ ≥ ≦ ≧ ≫ ≬ ≳ ≷ ≺ ≻ ≼ ≽ ≾ ≿ ⊂ ⊃ ⊆ ⊇ ⊏ ⊐ ⊑ ⊒ ⊢ ⊣ ⊩ ⊪ ⊸ ⋈ ⋍ ⋐ ⋑ ⋔ ⋙ ⋛ ⋞ ⋟ ⌢ ⌣ ⩾ ⪆ ⪌ ⪕ ⪖ ⪯ ⪰ ⪷ ⪸ ⫅ ⫆ ≲ ⩽ ⪅ ≶ ⋚ ⪋ ⟂ ⊨ ⊶ ⊷$ ≔ ≕ ⩴

否定关系符号¶

$\not =$ \not =


$\gnapprox$ `\gnapprox`	$\ngeqslant$ `\ngeqslant`	$\nsubseteq$ `\nsubseteq`	$\precneqq$ `\precneqq`
$\gneq$ `\gneq`	$\ngtr$ `\ngtr`	$\nsubseteqq$ `\nsubseteqq`	$\precnsim$ `\precnsim`
$\gneqq$ `\gneqq`	$\nleq$ `\nleq`	$\nsucc$ `\nsucc`	$\subsetneq$ `\subsetneq`
$\gnsim$ `\gnsim`	$\nleqq$ `\nleqq`	$\nsucceq$ `\nsucceq`	$\subsetneqq$ `\subsetneqq`
$\gvertneqq$ `\gvertneqq`	$\nleqslant$ `\nleqslant`	$\nsupseteq$ `\nsupseteq`	$\succnapprox$ `\succnapprox`
$\lnapprox$ `\lnapprox`	$\nless$ `\nless`	$\nsupseteqq$ `\nsupseteqq`	$\succneqq$ `\succneqq`
$\lneq$ `\lneq`	$\nmid$ `\nmid`	$\ntriangleleft$ `\ntriangleleft`	$\succnsim$ `\succnsim`
$\lneqq$ `\lneqq`	$\notin$ `\notin`	$\ntrianglelefteq$ `\ntrianglelefteq`	$\supsetneq$ `\supsetneq`
$\lnsim$ `\lnsim`	$\notni$ `\notni`	$\ntriangleright$ `\ntriangleright`	$\supsetneqq$ `\supsetneqq`
$\lvertneqq$ `\lvertneqq`	$\nparallel$ `\nparallel`	$\ntrianglerighteq$ `\ntrianglerighteq`	$\varsubsetneq$ `\varsubsetneq`
$\ncong$ `\ncong`	$\nprec$ `\nprec`	$\nvdash$ `\nvdash`	$\varsubsetneqq$ `\varsubsetneqq`
$\ne$ `\ne`	$\npreceq$ `\npreceq`	$\nvDash$ `\nvDash`	$\varsupsetneq$ `\varsupsetneq`
$\neq$ `\neq`	$\nshortmid$ `\nshortmid`	$\nVDash$ `\nVDash`	$\varsupsetneqq$ `\varsupsetneqq`
$\ngeq$ `\ngeq`	$\nshortparallel$ `\nshortparallel`	$\nVdash$ `\nVdash`
$\ngeqq$ `\ngeqq`	$\nsim$ `\nsim`	$\precnapprox$ `\precnapprox`

直接输入：$∉ ∌ ∤ ∦ ≁ ≆ ≠ ≨ ≩ ≮ ≯ ≰ ≱ ⊀ ⊁ ⊈ ⊉ ⊊ ⊋ ⊬ ⊭ ⊮ ⊯ ⋠ ⋡ ⋦ ⋧ ⋨ ⋩ ⋬ ⋭ ⪇ ⪈ ⪉ ⪊ ⪵ ⪶ ⪹ ⪺ ⫋ ⫌$

箭头¶


$\circlearrowleft$ `\circlearrowleft`	$\leftharpoonup$ `\leftharpoonup`	$\rArr$ `\rArr`
$\circlearrowright$ `\circlearrowright`	$\leftleftarrows$ `\leftleftarrows`	$\rarr$ `\rarr`
$\curvearrowleft$ `\curvearrowleft`	$\leftrightarrow$ `\leftrightarrow`	$\restriction$ `\restriction`
$\curvearrowright$ `\curvearrowright`	$\Leftrightarrow$ `\Leftrightarrow`	$\rightarrow$ `\rightarrow`
$\Darr$ `\Darr`	$\leftrightarrows$ `\leftrightarrows`	$\Rightarrow$ `\Rightarrow`
$\dArr$ `\dArr`	$\leftrightharpoons$ `\leftrightharpoons`	$\rightarrowtail$ `\rightarrowtail`
$\darr$ `\darr`	$\leftrightsquigarrow$ `\leftrightsquigarrow`	$\rightharpoondown$ `\rightharpoondown`
$\dashleftarrow$ `\dashleftarrow`	$\Lleftarrow$ `\Lleftarrow`	$\rightharpoonup$ `\rightharpoonup`
$\dashrightarrow$ `\dashrightarrow`	$\longleftarrow$ `\longleftarrow`	$\rightleftarrows$ `\rightleftarrows`
$\downarrow$ `\downarrow`	$\Longleftarrow$ `\Longleftarrow`	$\rightleftharpoons$ `\rightleftharpoons`
$\Downarrow$ `\Downarrow`	$\longleftrightarrow$ `\longleftrightarrow`	$\rightrightarrows$ `\rightrightarrows`
$\downdownarrows$ `\downdownarrows`	$\Longleftrightarrow$ `\Longleftrightarrow`	$\rightsquigarrow$ `\rightsquigarrow`
$\downharpoonleft$ `\downharpoonleft`	$\longmapsto$ `\longmapsto`	$\Rrightarrow$ `\Rrightarrow`
$\downharpoonright$ `\downharpoonright`	$\longrightarrow$ `\longrightarrow`	$\Rsh$ `\Rsh`
$\gets$ `\gets`	$\Longrightarrow$ `\Longrightarrow`	$\searrow$ `\searrow`
$\Harr$ `\Harr`	$\looparrowleft$ `\looparrowleft`	$\swarrow$ `\swarrow`
$\hArr$ `\hArr`	$\looparrowright$ `\looparrowright`	$\to$ `\to`
$\harr$ `\harr`	$\Lrarr$ `\Lrarr`	$\twoheadleftarrow$ `\twoheadleftarrow`
$\hookleftarrow$ `\hookleftarrow`	$\lrArr$ `\lrArr`	$\twoheadrightarrow$ `\twoheadrightarrow`
$\hookrightarrow$ `\hookrightarrow`	$\lrarr$ `\lrarr`	$\Uarr$ `\Uarr`
$\iff$ `\iff`	$\Lsh$ `\Lsh`	$\uArr$ `\uArr`
$\impliedby$ `\impliedby`	$\mapsto$ `\mapsto`	$\uarr$ `\uarr`
$\implies$ `\implies`	$\nearrow$ `\nearrow`	$\uparrow$ `\uparrow`
$\Larr$ `\Larr`	$\nleftarrow$ `\nleftarrow`	$\Uparrow$ `\Uparrow`
$\lArr$ `\lArr`	$\nLeftarrow$ `\nLeftarrow`	$\updownarrow$ `\updownarrow`
$\larr$ `\larr`	$\nleftrightarrow$ `\nleftrightarrow`	$\Updownarrow$ `\Updownarrow`
$\leadsto$ `\leadsto`	$\nLeftrightarrow$ `\nLeftrightarrow`	$\upharpoonleft$ `\upharpoonleft`
$\leftarrow$ `\leftarrow`	$\nrightarrow$ `\nrightarrow`	$\upharpoonright$ `\upharpoonright`
$\Leftarrow$ `\Leftarrow`	$\nRightarrow$ `\nRightarrow`	$\upuparrows$ `\upuparrows`
$\leftarrowtail$ `\leftarrowtail`	$\nwarrow$ `\nwarrow`
$\leftharpoondown$ `\leftharpoondown`	$\Rarr$ `\Rarr`

直接输入：$← ↑ → ↓ ↔ ↕ ↖ ↗ ↘ ↙ ↚ ↛ ↞ ↠ ↢ ↣ ↦ ↩ ↪ ↫ ↬ ↭ ↮ ↰ ↱↶ ↷ ↺ ↻ ↼ ↽ ↾ ↾ ↿ ⇀ ⇁ ⇂ ⇃ ⇄ ⇆ ⇇ ⇈ ⇉ ⇊ ⇋ ⇌⇍ ⇎ ⇏ ⇐ ⇑ ⇒ ⇓ ⇔ ⇕ ⇚ ⇛ ⇝ ⇠ ⇢ ⟵ ⟶ ⟷ ⟸ ⟹ ⟺ ⟼$ ↽

可延展箭头


$\xleftarrow{abc}$ `\xleftarrow{abc}`	$\xrightarrow[under]{over}$ `\xrightarrow[under]{over}`
$\xLeftarrow{abc}$ `\xLeftarrow{abc}`	$\xRightarrow{abc}$ `\xRightarrow{abc}`
$\xleftrightarrow{abc}$ `\xleftrightarrow{abc}`	$\xLeftrightarrow{abc}$ `\xLeftrightarrow{abc}`
$\xhookleftarrow{abc}$ `\xhookleftarrow{abc}`	$\xhookrightarrow{abc}$ `\xhookrightarrow{abc}`
$\xtwoheadleftarrow{abc}$ `\xtwoheadleftarrow{abc}`	$\xtwoheadrightarrow{abc}$ `\xtwoheadrightarrow{abc}`
$\xleftharpoonup{abc}$ `\xleftharpoonup{abc}`	$\xrightharpoonup{abc}$ `\xrightharpoonup{abc}`
$\xleftharpoondown{abc}$ `\xleftharpoondown{abc}`	$\xrightharpoondown{abc}$ `\xrightharpoondown{abc}`
$\xleftrightharpoons{abc}$ `\xleftrightharpoons{abc}`	$\xrightleftharpoons{abc}$ `\xrightleftharpoons{abc}`
$\xtofrom{abc}$ `\xtofrom{abc}`	$\xmapsto{abc}$ `\xmapsto{abc}`
$\xlongequal{abc}$ `\xlongequal{abc}`

所有可延展箭头都可以像 \xrightarrow[under]{over} 一样
接受一个可选参数。

特殊记号¶

Bra-ket 记号（狄拉克记号）


$\bra{\phi}$ `\bra{\phi}`	$\ket{\psi}$ `\ket{\psi}`	$\braket{\phi\VERT\psi}$ `\braket{\phi\|\psi}`
$\Bra{\phi}$ `\Bra{\phi}`	$\Ket{\psi}$ `\Ket{\psi}`	$\Braket{ ϕ \VERT \frac{∂^2}{∂ t^2} \VERT ψ }$ `\Braket{ ϕ \| \frac{∂^2}{∂ t^2} \| ψ }`

样式、颜色、大小与字体¶

类别指定

\mathbin \mathclose \mathinner \mathop
\mathopen \mathord \mathpunct \mathrel

颜色

$\color{blue} F=ma$ \color{blue} F=ma

注意，\color 的作用类似一个开关。其他颜色函数则要求将内容作为函数参数传入：

$\textcolor{blue}{F=ma}$ \textcolor{blue}{F=ma}
$\textcolor{#228B22}{F=ma}$ \textcolor{#228B22}{F=ma}
$\colorbox{aqua}{$F=ma$}$ \colorbox{aqua}{$F=ma$}
$\fcolorbox{red}{aqua}{$F=ma$}$ \fcolorbox{red}{aqua}{$F=ma$}

注意，与 LaTeX 一样，\colorbox 和 \fcolorbox 会将第三个参数渲染为文本，因此你可能需要像上面的例子那样用 $ 切换回数学模式。

在颜色定义方面，KaTeX 的颜色函数接受标准的 HTML 预定义颜色名称，也接受 CSS 十六进制风格的 RGB 参数。六位十六进制数值前的 "#" 是可选的。

字体


$\mathrm{Ab0}$ `\mathrm{Ab0}`	$\mathbf{Ab0}$ `\mathbf{Ab0}`	$\mathsf{Ab0}$ `\mathsf{Ab0}`
$\mathnormal{Ab0}$ `\mathnormal{Ab0}`	$\textbf{Ab0}$ `\textbf{Ab0}`	$\textsf{Ab0}$ `\textsf{Ab0}`
$\textrm{Ab0}$ `\textrm{Ab0}`	$\bf Ab0$ `\bf Ab0`	$\sf Ab0$ `\sf Ab0`
$\rm Ab0$ `\rm Ab0`	$\bold{Ab0}$ `\bold{Ab0}`	$\mathsfit{Ab0}$ `\mathsfit{Ab0}`
$\textnormal{Ab0}$ `\textnormal{Ab0}`	$\boldsymbol{Ab0}$ `\boldsymbol{Ab0}`	$\Bbb{AB}$ `\Bbb{AB}`
$\text{Ab0}$ `\text{Ab0}`	$\bm{Ab0}$ `\bm{Ab0}`	$\mathbb{AB}$ `\mathbb{AB}`
$\textup{Ab0}$ `\textup{Ab0}`	$\textmd{Ab0}$ `\textmd{Ab0}`	$\frak{Ab0}$ `\frak{Ab0}`
$\mathit{Ab0}$ `\mathit{Ab0}`	$\mathtt{Ab0}$ `\mathtt{Ab0}`	$\mathfrak{Ab0}$ `\mathfrak{Ab0}`
$\textit{Ab0}$ `\textit{Ab0}`	$\texttt{Ab0}$ `\texttt{Ab0}`	$\mathcal{AB0}$ `\mathcal{AB0}`
$\it Ab0$ `\it Ab0`	$\tt Ab0$ `\tt Ab0`	$\cal AB0$ `\cal AB0`
$\emph{Ab0}$ `\emph{Ab0}`		$\mathscr{AB}$ `\mathscr{AB}`

使用字体函数的 \textXX 版本，可以将字体族、字重和字形叠加在一起。例如 \textsf{\textbf{H}} 会得到 $\textsf{\textbf{H}}$。其他版本则无法叠加，例如 \mathsf{\mathbf{H}} 只会得到 $\mathsf{\mathbf{H}}$。

当 KaTeX 字体中没有某个粗体字形时，可以用 \pmb 来模拟。例如 \pmb{\mu} 会渲染为：$\pmb{\mu}$

大小


$\Huge AB$ `\Huge AB`	$\normalsize AB$ `\normalsize AB`
$\huge AB$ `\huge AB`	$\small AB$ `\small AB`
$\LARGE AB$ `\LARGE AB`	$\footnotesize AB$ `\footnotesize AB`
$\Large AB$ `\Large AB`	$\scriptsize AB$ `\scriptsize AB`
$\large AB$ `\large AB`	$\tiny AB$ `\tiny AB`

样式


$\displaystyle\sum_{i=1}^n$ `\displaystyle\sum_{i=1}^n`
$\textstyle\sum_{i=1}^n$ `\textstyle\sum_{i=1}^n`
$\scriptstyle x$ `\scriptstyle x` （第一级上下标的大小）
$\scriptscriptstyle x$ `\scriptscriptstyle x`（更深层级上下标的大小）
$\lim\limits_x$ `\lim\limits_x`
$\lim\nolimits_x$ `\lim\nolimits_x`
$\verb!x^2!$ `\verb!x^2!`

\text{…} 可以接受嵌套的 $…$ 片段，并将其渲染为数学模式。

符号与标点¶


`% comment`	$\dots$ `\dots`	$\KaTeX$ `\KaTeX`
$\%$ `\%`	$\cdots$ `\cdots`	$\LaTeX$ `\LaTeX`
$\#$ `\#`	$\ddots$ `\ddots`	$\TeX$ `\TeX`
$\&$ `\&`	$\ldots$ `\ldots`	$\nabla$ `\nabla`
$\_$ `\_`	$\vdots$ `\vdots`	$\infty$ `\infty`
$\text{\textunderscore}$ `\text{\textunderscore}`	$\dotsb$ `\dotsb`	$\infin$ `\infin`
$\text~~}$ `\text{`~~	$\dotsc$ `\dotsc`	$\checkmark$ `\checkmark`
$\text{\textendash}$ `\text{\textendash}`	$\dotsi$ `\dotsi`	$\dag$ `\dag`
$\text~~-}$ `\text{-`~~	$\dotsm$ `\dotsm`	$\dagger$ `\dagger`
$\text{\textemdash}$ `\text{\textemdash}`	$\dotso$ `\dotso`	$\text{\textdagger}$ `\text{\textdagger}`
$\text{\textasciitilde}$ `\text{\textasciitilde}`	$\sdot$ `\sdot`	$\ddag$ `\ddag`
$\text{\textasciicircum}$ `\text{\textasciicircum}`	$\mathellipsis$ `\mathellipsis`	$\ddagger$ `\ddagger`
$`$ <code>`	$\text{\textellipsis}$ `\text{\textellipsis}`	$\text{\textdaggerdbl}$ `\text{\textdaggerdbl}`
$\text{\textquoteleft}$ `\text{\textquoteleft}`	$\Box$ `\Box`	$\Dagger$ `\Dagger`
$\lq$ `\lq`	$\square$ `\square`	$\angle$ `\angle`
$\text{\textquoteright}$ `\text{\textquoteright}`	$\blacksquare$ `\blacksquare`	$\measuredangle$ `\measuredangle`
$\rq$ `\rq`	$\triangle$ `\triangle`	$\sphericalangle$ `\sphericalangle`
$\text{\textquotedblleft}$ `\text{\textquotedblleft}`	$\triangledown$ `\triangledown`	$\top$ `\top`
$"$ `"`	$\triangleleft$ `\triangleleft`	$\bot$ `\bot`
$\text{\textquotedblright}$ `\text{\textquotedblright}`	$\triangleright$ `\triangleright`	$\$$ `\$`
$\colon$ `\colon`	$\bigtriangledown$ `\bigtriangledown`	$\text{\textdollar}$ `\text{\textdollar}`
$\backprime$ `\backprime`	$\bigtriangleup$ `\bigtriangleup`	$\pounds$ `\pounds`
$\prime$ `\prime`	$\blacktriangle$ `\blacktriangle`	$\mathsterling$ `\mathsterling`
$\text{\textless}$ `\text{\textless}`	$\blacktriangledown$ `\blacktriangledown`	$\text{\textsterling}$ `\text{\textsterling}`
$\text{\textgreater}$ `\text{\textgreater}`	$\blacktriangleleft$ `\blacktriangleleft`	$\yen$ `\yen`
$\text{\textbar}$ `\text{\textbar}`	$\blacktriangleright$ `\blacktriangleright`	$\surd$ `\surd`
$\text{\textbardbl}$ `\text{\textbardbl}`	$\diamond$ `\diamond`	$\degree$ `\degree`
$\text{\textbraceleft}$ `\text{\textbraceleft}`	$\Diamond$ `\Diamond`	$\text{\textdegree}$ `\text{\textdegree}`
$\text{\textbraceright}$ `\text{\textbraceright}`	$\lozenge$ `\lozenge`	$\mho$ `\mho`
$\text{\textbackslash}$ `\text{\textbackslash}`	$\blacklozenge$ `\blacklozenge`	$\diagdown$ `\diagdown`
$\text{\P}$ `\text{\P}` 或 `\P`	$\star$ `\star`	$\diagup$ `\diagup`
$\text{\S}$ `\text{\S}` 或 `\S`	$\bigstar$ `\bigstar`	$\flat$ `\flat`
$\text{\sect}$ `\text{\sect}`	$\clubsuit$ `\clubsuit`	$\natural$ `\natural`
$\copyright$ `\copyright`	$\clubs$ `\clubs`	$\sharp$ `\sharp`
$\circledR$ `\circledR`	$\diamondsuit$ `\diamondsuit`	$\heartsuit$ `\heartsuit`
$\text{\textregistered}$ `\text{\textregistered}`	$\diamonds$ `\diamonds`	$\hearts$ `\hearts`
$\circledS$ `\circledS`	$\spadesuit$ `\spadesuit`	$\spades$ `\spades`
$\text{\textcircled a}$ `\text{\textcircled a}`	$\maltese$ `\maltese`	$\minuso$ `\minuso`

直接输入：§ ¶ $ £ ¥ ∇ ∞ · ∠ ∡ ∢ ♠ ♡ ♢ ♣ ♭ ♮ ♯ ✓ … ⋮ ⋯ ⋱ !$ ‼ ⦵

单位¶

在 KaTeX 中，单位的比例关系与 TeX 中一致。
KaTeX 单位与 CSS 单位不同。

KaTeX 单位	数值	KaTeX 单位	数值
em	CSS em	bp	1/72 英寸 × F × G
ex	CSS ex	pc	12 KaTeX pt
mu	1/18 CSS em	dd	1238/1157 KaTeX pt
pt	1/72.27 英寸 × F × G	cc	14856/1157 KaTeX pt
mm	1 mm × F × G	nd	685/642 KaTeX pt
cm	1 cm × F × G	nc	1370/107 KaTeX pt
in	1 英寸 × F × G	sp	1/65536 KaTeX pt

其中：

\[ F = （周围 HTML 文本的字体大小）/(10 pt) \]

G 默认为 1.21，因为 KaTeX 的字体大小通常是周围字体大小的 1.21 倍。该值可以被覆盖，通过 HTML 页面的 CSS 来实现。

样式与大小对单位的影响：

单位	textstyle	scriptscript	huge
em 或 ex	$\rule{1em}{1em}$	$\scriptscriptstyle\rule{1em}{1em}$	$\huge\rule{1em}{1em}$
mu	$\rule{18mu}{18mu}$	$\scriptscriptstyle\rule{18mu}{18mu}$	$\huge\rule{18mu}{18mu}$
其他	$\rule{10pt}{10pt}$	$\scriptscriptstyle\rule{10pt}{10pt}$	$\huge\rule{10pt}{10pt}$


\(a'\) `a'`	\(\tilde{a}\) `\tilde{a}`	\(\mathring{g}\) `\mathring{g}`
\(a''\) `a''`	\(\widetilde{ac}\) `\widetilde{ac}`	\(\overgroup{AB}\) `\overgroup{AB}`
\(a^{\prime}\) `a^{\prime}`	\(\utilde{AB}\) `\utilde{AB}`	\(\undergroup{AB}\) `\undergroup{AB}`
\(\acute{a}\) `\acute{a}`	\(\vec{F}\) `\vec{F}`	\(\Overrightarrow{AB}\) `\Overrightarrow{AB}`
\(\bar{y}\) `\bar{y}`	\(\overleftarrow{AB}\) `\overleftarrow{AB}`	\(\overrightarrow{AB}\) `\overrightarrow{AB}`
\(\breve{a}\) `\breve{a}`	\(\underleftarrow{AB}\) `\underleftarrow{AB}`	\(\underrightarrow{AB}\) `\underrightarrow{AB}`
\(\check{a}\) `\check{a}`	\(\overleftharpoon{ac}\) `\overleftharpoon{ac}`	\(\overrightharpoon{ac}\) `\overrightharpoon{ac}`
\(\dot{a}\) `\dot{a}`	\(\overleftrightarrow{AB}\) `\overleftrightarrow{AB}`	\(\overbrace{AB}\) `\overbrace{AB}`
\(\ddot{a}\) `\ddot{a}`	\(\underleftrightarrow{AB}\) `\underleftrightarrow{AB}`	\(\underbrace{AB}\) `\underbrace{AB}`
\(\dddot{a}\) `\dddot{a}`	\(\overline{AB}\) `\overline{AB}`	\(\overbracket{AB}\) `\overbracket{AB}`
\(\ddddot{a}\) `\ddddot{a}`	\(\underline{AB}\) `\underline{AB}`	\(\underbracket{AB}\) `\underbracket{AB}`
\(\grave{a}\) `\grave{a}`	\(\underbar{X}\) `\underbar{X}`	\(\overlinesegment{AB}\) `\overlinesegment{AB}`
\(\hat{\theta}\) `\hat{\theta}`	\(\widecheck{ac}\) `\widecheck{ac}`	\(\underlinesegment{AB}\) `\underlinesegment{AB}`
	\(\widehat{ac}\) `\widehat{ac}`


\(\text{\'{a}}\) `\'{a}`	\(\text{\~{a}}\) `\~{a}`	\(\text{\.{a}}\) `\.{a}`	\(\text{\H{a}}\) `\H{a}`
\(\text{\`{a}}\) \{a}</code>\|$\text{\={a}}$={a}\|$\text{\"{a}}$\"{a}\|$\text{\v{a}}$\v{a}`
\(\text{\^{a}}\) `\^{a}`	\(\text{\u{a}}\) `\u{a}`	\(\text{\r{a}}\) `\r{a}`


\((~)\) `( )`	\(\lparen~\rparen\) `\lparen` \(~~~~\)`\rparen`	\(⌈~⌉\) `⌈ ⌉`	\(\lceil~\rceil\) `\lceil` \(~~~~~\)`\rceil`	\(\uparrow\) `\uparrow`
\([~]\) `[ ]`	\(\lbrack~\rbrack\) `\lbrack` \(~~~~\)`\rbrack`	\(⌊~⌋\) `⌊ ⌋`	\(\lfloor~\rfloor\) `\lfloor` \(~~~~~\)`\rfloor`	\(\downarrow\) `\downarrow`
\(\{ \}\) `\{ \}`	\(\lbrace \rbrace\) `\lbrace` \(~~~~\)`\rbrace`	\(⎰⎱\) `⎰⎱`	\(\lmoustache \rmoustache\) `\lmoustache` \(~~~~\)`\rmoustache`	\(\updownarrow\) `\updownarrow`
\(⟨~⟩\) `⟨ ⟩`	\(\langle~\rangle\) `\langle` \(~~~~\)`\rangle`	\(⟮~⟯\) `⟮ ⟯`	\(\lgroup~\rgroup\) `\lgroup` \(~~~~~\)`\rgroup`	\(\Uparrow\) `\Uparrow`
\(\vert\) `\|`	\(\vert\) `\vert`	\(┌ ┐\) `┌ ┐`	\(\ulcorner \urcorner\) `\ulcorner` \(~~~~\)`\urcorner`	\(\Downarrow\) `\Downarrow`
\(\Vert\) `\\|`	\(\Vert\) `\Vert`	\(└ ┘\) `└ ┘`	\(\llcorner \lrcorner\) `\llcorner` \(~~~~\)`\lrcorner`	\(\Updownarrow\) `\Updownarrow`
\(\lvert~\rvert\) `\lvert` \(~~~~\)`\rvert`	\(\lVert~\rVert\) `\lVert` \(~~~~~\)`\rVert`	`\left.`	`\right.`	\(\backslash\) `\backslash`
\(\lang~\rang\) `\lang` \(~~~~\)`\rang`	\(\left\lt~\right\gt\) `\lt \gt`	\(⟦~⟧\) `⟦ ⟧`	\(\llbracket~\rrbracket\) `\llbracket` \(~~~~\)`\rrbracket`	\(/\) `/`
\(\lBrace~\rBrace\) `\lBrace \rBrace`


\(\Alpha\) `\Alpha`	\(\Beta\) `\Beta`	\(\Gamma\) `\Gamma`	\(\Delta\) `\Delta`
\(\Epsilon\) `\Epsilon`	\(\Zeta\) `\Zeta`	\(\Eta\) `\Eta`	\(\Theta\) `\Theta`
\(\Iota\) `\Iota`	\(\Kappa\) `\Kappa`	\(\Lambda\) `\Lambda`	\(\Mu\) `\Mu`
\(\Nu\) `\Nu`	\(\Xi\) `\Xi`	\(\Omicron\) `\Omicron`	\(\Pi\) `\Pi`
\(\Rho\) `\Rho`	\(\Sigma\) `\Sigma`	\(\Tau\) `\Tau`	\(\Upsilon\) `\Upsilon`
\(\Phi\) `\Phi`	\(\Chi\) `\Chi`	\(\Psi\) `\Psi`	\(\Omega\) `\Omega`
\(\varGamma\) `\varGamma`	\(\varDelta\) `\varDelta`	\(\varTheta\) `\varTheta`	\(\varLambda\) `\varLambda`
\(\varXi\) `\varXi`	\(\varPi\) `\varPi`	\(\varSigma\) `\varSigma`	\(\varUpsilon\) `\varUpsilon`
\(\varPhi\) `\varPhi`	\(\varPsi\) `\varPsi`	\(\varOmega\) `\varOmega`
\(\alpha\) `\alpha`	\(\beta\) `\beta`	\(\gamma\) `\gamma`	\(\delta\) `\delta`
\(\epsilon\) `\epsilon`	\(\zeta\) `\zeta`	\(\eta\) `\eta`	\(\theta\) `\theta`
\(\iota\) `\iota`	\(\kappa\) `\kappa`	\(\lambda\) `\lambda`	\(\mu\) `\mu`
\(\nu\) `\nu`	\(\xi\) `\xi`	\(\omicron\) `\omicron`	\(\pi\) `\pi`
\(\rho\) `\rho`	\(\sigma\) `\sigma`	\(\tau\) `\tau`	\(\upsilon\) `\upsilon`
\(\phi\) `\phi`	\(\chi\) `\chi`	\(\psi\) `\psi`	\(\omega\) `\omega`
\(\varepsilon\) `\varepsilon`	\(\varkappa\) `\varkappa`	\(\vartheta\) `\vartheta`	\(\thetasym\) `\thetasym`
\(\varpi\) `\varpi`	\(\varrho\) `\varrho`	\(\varsigma\) `\varsigma`	\(\varphi\) `\varphi`
$\digamma $ `\digamma`


\(\imath\) `\imath`	\(\nabla\) `\nabla`	\(\Im\) `\Im`	\(\Reals\) `\Reals`	\(\text{\OE}\) `\text{\OE}`
\(\jmath\) `\jmath`	\(\partial\) `\partial`	\(\image\) `\image`	\(\wp\) `\wp`	\(\text{\o}\) `\text{\o}`
\(\aleph\) `\aleph`	\(\Game\) `\Game`	\(\Bbbk\) `\Bbbk`	\(\weierp\) `\weierp`	\(\text{\O}\) `\text{\O}`
\(\alef\) `\alef`	\(\Finv\) `\Finv`	\(\N\) `\N`	\(\Z\) `\Z`	\(\text{\ss}\) `\text{\ss}`
\(\alefsym\) `\alefsym`	\(\cnums\) `\cnums`	\(\natnums\) `\natnums`	\(\text{\aa}\) `\text{\aa}`	\(\text{\i}\) `\text{\i}`
\(\beth\) `\beth`	\(\Complex\) `\Complex`	\(\R\) `\R`	\(\text{\AA}\) `\text{\AA}`	\(\text{\j}\) `\text{\j}`
\(\gimel\) `\gimel`	\(\ell\) `\ell`	\(\Re\) `\Re`	\(\text{\ae}\) `\text{\ae}`
\(\daleth\) `\daleth`	\(\hbar\) `\hbar`	\(\real\) `\real`	\(\text{\AE}\) `\text{\AE}`
\(\eth\) `\eth`	\(\hslash\) `\hslash`	\(\reals\) `\reals`	\(\text{\oe}\) `\text{\oe}`


\(\begin{matrix} a & b \\ c & d \end{matrix}\)	`\begin{matrix}` `a & b \\` `c & d` `\end{matrix}`	\(\begin{array}{cc}a & b\\c & d\end{array}\)	`\begin{array}{cc}` `a & b \\` `c & d` `\end{array}`
\(\begin{pmatrix} a & b \\ c & d \end{pmatrix}\)	`\begin{pmatrix}` `a & b \\` `c & d` `\end{pmatrix}`	\(\begin{bmatrix} a & b \\ c & d \end{bmatrix}\)	`\begin{bmatrix}` `a & b \\` `c & d` `\end{bmatrix}`
\(\begin{vmatrix} a & b \\ c & d \end{vmatrix}\)	`\begin{vmatrix}` `a & b \\` `c & d` `\end{vmatrix}`	\(\begin{Vmatrix} a & b \\ c & d \end{Vmatrix}\)	`\begin{Vmatrix}` `a & b \\` `c & d` `\end{Vmatrix}`
\(\begin{Bmatrix} a & b \\ c & d \end{Bmatrix}\)	`\begin{Bmatrix}` `a & b \\` `c & d` `\end{Bmatrix}`	\(\def\arraystretch{1.5}\begin{array}{c:c:c} a & b & c \\ \hline d & e & f \\ \hdashline g & h & i \end{array}\)	`\def\arraystretch{1.5}` `\begin{array}{c:c:c}` `a & b & c \\ \hline` `d & e & f \\` `\hdashline` `g & h & i` `\end{array}`
\(x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}\)	`x = \begin{cases}` `a &\text{if } b \\` `c &\text{if } d` `\end{cases}`	\(\begin{rcases} a &\text{if } b \\ c &\text{if } d \end{rcases}⇒…\)	`\begin{rcases}` `a &\text{if } b \\` `c &\text{if } d` `\end{rcases}⇒…`
\(\begin{smallmatrix} a & b \\ c & d \end{smallmatrix}\)	`\begin{smallmatrix}` `a & b \\` `c & d` `\end{smallmatrix}`	$\(\sum_{\begin{subarray}{l} i\in\Lambda\\ 0<j<n\end{subarray}}\)$	`\sum_{` `\begin{subarray}{l}` `i\in\Lambda\\` `0<j<n` `\end{subarray}}`


$\(\begin{equation}\begin{split}a &=b+c\\&=e+f\end{split}\end{equation}\)$	`\begin{equation}` `\begin{split}` `a &=b+c\\` `&=e+f` `\end{split}` `\end{equation}`	$\(\begin{align} a&=b+c \\ d+e&=f \end{align}\)$	`\begin{align}` `a&=b+c \\` `d+e&=f` `\end{align}`
$\(\begin{gather} a=b \\ e=b+c \end{gather}\)$	`\begin{gather}` `a=b \\` `e=b+c` `\end{gather}`	$\(\begin{alignat}{2}10&x+&3&y=2\\3&x+&13&y=4\end{alignat}\)$	`\begin{alignat}{2}` `10&x+&3&y=2\\` `3&x+&13&y=4` `\end{alignat}`
$\(\begin{CD}A @>a>> B \\@VbVV @AAcA\\C @= D\end{CD}\)$	`\begin{CD}` `A @>a>> B \\` `@VbVV @AAcA \\` `C @= D` `\end{CD}`


\(\href{https://katex.org/}{\KaTeX}\)	`\href{https://katex.org/}{\KaTeX}`
\(\url{https://katex.org/}\)	`\url{https://katex.org/}`
\(\includegraphics[height=0.8em, totalheight=0.9em, width=0.9em, alt=KA logo]{https://katex.org/img/khan-academy.png}\)	`\includegraphics[height=0.8em, totalheight=0.9em, width=0.9em, alt=KA logo]{https://katex.org/img/khan-academy.png}`
\(\htmlId{bar}{x}\) `…<span id="bar" class="enclosing">…x…</span>…`	`\htmlId{bar}{x}`
\(\htmlClass{foo}{x}\) `…<span class="enclosing foo">…x…</span>…`	`\htmlClass{foo}{x}`
\(\htmlStyle{color: red;}{x}\) `…<span style="color: red;" class="enclosing">…x…</span>…`	`\htmlStyle{color: red;}{x}`
\(\htmlData{foo=a, bar=b}{x}\) `…<span data-foo="a" data-bar="b" class="enclosing">…x…</span>…`	`\htmlData{foo=a, bar=b}{x}`

项目	范围	项目	范围
粗体	\(\text{𝐀-𝐙 𝐚-𝐳 𝟎-𝟗}\)	双线体	\(\text{𝔸-}ℤ\ 𝕜\)
斜体	\(\text{𝐴-𝑍 𝑎-𝑧}\)	无衬线体	\(\text{𝖠-𝖹 𝖺-𝗓 𝟢-𝟫}\)
粗斜体	\(\text{𝑨-𝒁 𝒂-𝒛}\)	无衬线粗体	\(\text{𝗔-𝗭 𝗮-𝘇 𝟬-𝟵}\)
手写体	\(\text{𝒜-𝒵}\)	无衬线斜体	\(\text{𝘈-𝘡 𝘢-𝘻}\)
德文尖角体	\(\text{\)𝔄\(-\)ℨ$}\text{ \(𝔞\)-\(𝔷\)}$	等宽体	\(\text{𝙰-𝚉 𝚊-𝚣 𝟶-𝟿}\)
德文尖角粗体	\(\text{𝕬-𝖅 𝖆-𝖟}\)


\(\cancel{5}\) `\cancel{5}`	\(\overbrace{a+b+c}^{\text{note}}\) `\overbrace{a+b+c}^{\text{note}}`
\(\bcancel{5}\) `\bcancel{5}`	\(\underbrace{a+b+c}_{\text{note}}\) `\underbrace{a+b+c}_{\text{note}}`
\(\xcancel{ABC}\) `\xcancel{ABC}`	\(\not =\) `\not =`
\(\text{\sout{abc}}\) `\text{\sout{abc}}`	\(\boxed{\pi=\frac c d}\) `\boxed{\pi=\frac c d}`
\(a_{\angl n}\) `$a_{\angl n}`	\(a_\angln\) `a_\angln`
\(\overbracket{a+b+c}^{\text{note}}\) `\overbracket{a+b+c}^{\text{note}}`	\(\underbracket{a+b+c}_{\text{note}}\) `\underbracket{a+b+c}_{\text{note}}`
\(\phase{-78^\circ}\)`\phase{-78^\circ}`


\(x_n\) `x_n`	\(\stackrel{!}{=}\) `\stackrel{!}{=}`	\(a \atop b\) `a \atop b`
\(e^x\) `e^x`	\(\overset{!}{=}\) `\overset{!}{=}`	\(a\raisebox{0.25em}{\)b\(}c\) `a\raisebox{0.25em}{$b$}c`
$_u^o $ `_u^o`	\(\underset{!}{=}\) `\underset{!}{=}`	\(a+\left(\vcenter{\frac{\frac a b}c}\right)\) `a+\left(\vcenter{\hbox{$\frac{\frac a b}c$}}\right)`
		$\(\sum_{\substack{0<i<m\\0<j<n}}\)$ `\sum_{\substack{0<i<m\\0<j<n}}`


\({=}\mathllap{/\,}\) `{=}\mathllap{/\,}`	\(\left(x^{\smash{2}}\right)\) `\left(x^{\smash{2}}\right)`
\(\mathrlap{\,/}{=}\) `\mathrlap{\,/}{=}`	\(\sqrt{\smash[b]{y}}\) `\sqrt{\smash[b]{y}}`


\(\forall\) `\forall`	\(\complement\) `\complement`	\(\therefore\) `\therefore`	\(\emptyset\) `\emptyset`
\(\exists\) `\exists`	\(\subset\) `\subset`	\(\because\) `\because`	\(\empty\) `\empty`
\(\exist\) `\exist`	\(\supset\) `\supset`	\(\mapsto\) `\mapsto`	\(\varnothing\) `\varnothing`
\(\nexists\) `\nexists`	\(\mid\) `\mid`	\(\to\) `\to`	\(\implies\) `\implies`
\(\in\) `\in`	\(\land\) `\land`	\(\gets\) `\gets`	\(\impliedby\) `\impliedby`
\(\isin\) `\isin`	\(\lor\) `\lor`	\(\leftrightarrow\) `\leftrightarrow`	\(\iff\) `\iff`
\(\notin\) `\notin`	\(\ni\) `\ni`	\(\notni\) `\notni`	\(\neg\) `\neg` 或 `\lnot`
	\(\Set{ x \VERT x<\frac 1 2 }\) `\Set{ x \| x<\frac 1 2 }`	\(\set{x\VERT x<5}\) `\set{x\|x<5}`


\(\def\foo{x^2} \foo + \foo\)	`\def\foo{x^2} \foo + \foo`
\(\gdef\foo#1{#1^2} \foo{y} + \foo{y}\)	`\gdef\foo#1{#1^2} \foo{y} + \foo{y}`
	`\edef\macroname#1#2…{definition to be expanded}`
	`\xdef\macroname#1#2…{definition to be expanded}`
	`\let\foo=\bar`
	`\futurelet\foo\bar x`
	`\global\def\macroname#1#2…{definition}`
	`\newcommand\macroname[numargs]{definition}`
	`\renewcommand\macroname[numargs]{definition}`
	`\providecommand\macroname[numargs]{definition}`


\(\sum\) `\sum`	\(\prod\) `\prod`	\(\bigotimes\) `\bigotimes`	\(\bigvee\) `\bigvee`
\(\int\) `\int`	\(\coprod\) `\coprod`	\(\bigoplus\) `\bigoplus`	\(\bigwedge\) `\bigwedge`
\(\iint\) `\iint`	\(\intop\) `\intop`	\(\bigodot\) `\bigodot`	\(\bigcap\) `\bigcap`
\(\iiint\) `\iiint`	\(\smallint\) `\smallint`	\(\biguplus\) `\biguplus`	\(\bigcup\) `\bigcup`
\(\oint\) `\oint`	\(\oiint\) `\oiint`	\(\oiiint\) `\oiiint`	\(\bigsqcup\) `\bigsqcup`


\(\arcsin\) `\arcsin`	\(\cosec\) `\cosec`	\(\deg\) `\deg`	\(\sec\) `\sec`
\(\arccos\) `\arccos`	\(\cosh\) `\cosh`	\(\dim\) `\dim`	\(\sin\) `\sin`
\(\arctan\) `\arctan`	\(\cot\) `\cot`	\(\exp\) `\exp`	\(\sinh\) `\sinh`
\(\arctg\) `\arctg`	\(\cotg\) `\cotg`	\(\hom\) `\hom`	\(\sh\) `\sh`
\(\arcctg\) `\arcctg`	\(\coth\) `\coth`	\(\ker\) `\ker`	\(\tan\) `\tan`
\(\arg\) `\arg`	\(\csc\) `\csc`	\(\lg\) `\lg`	\(\tanh\) `\tanh`
\(\ch\) `\ch`	\(\ctg\) `\ctg`	\(\ln\) `\ln`	\(\tg\) `\tg`
\(\cos\) `\cos`	\(\cth\) `\cth`	\(\log\) `\log`	\(\th\) `\th`
\(\operatorname{f}\) `\operatorname{f}`
\(\argmax\) `\argmax`	\(\injlim\) `\injlim`	\(\min\) `\min`	\(\varinjlim\) `\varinjlim`
\(\argmin\) `\argmin`	\(\lim\) `\lim`	\(\plim\) `\plim`	\(\varliminf\) `\varliminf`
\(\det\) `\det`	\(\liminf\) `\liminf`	\(\Pr\) `\Pr`	\(\varlimsup\) `\varlimsup`
\(\gcd\) `\gcd`	\(\limsup\) `\limsup`	\(\projlim\) `\projlim`	\(\varprojlim\) `\varprojlim`
\(\inf\) `\inf`	\(\max\) `\max`	\(\sup\) `\sup`
\(\operatorname{f}\) `\operatorname{f}`	\(\operatornamewithlimits{f}\) `\operatornamewithlimits{f}`


\(\xleftarrow{abc}\) `\xleftarrow{abc}`	\(\xrightarrow[under]{over}\) `\xrightarrow[under]{over}`
\(\xLeftarrow{abc}\) `\xLeftarrow{abc}`	\(\xRightarrow{abc}\) `\xRightarrow{abc}`
\(\xleftrightarrow{abc}\) `\xleftrightarrow{abc}`	\(\xLeftrightarrow{abc}\) `\xLeftrightarrow{abc}`
\(\xhookleftarrow{abc}\) `\xhookleftarrow{abc}`	\(\xhookrightarrow{abc}\) `\xhookrightarrow{abc}`
\(\xtwoheadleftarrow{abc}\) `\xtwoheadleftarrow{abc}`	\(\xtwoheadrightarrow{abc}\) `\xtwoheadrightarrow{abc}`
\(\xleftharpoonup{abc}\) `\xleftharpoonup{abc}`	\(\xrightharpoonup{abc}\) `\xrightharpoonup{abc}`
\(\xleftharpoondown{abc}\) `\xleftharpoondown{abc}`	\(\xrightharpoondown{abc}\) `\xrightharpoondown{abc}`
\(\xleftrightharpoons{abc}\) `\xleftrightharpoons{abc}`	\(\xrightleftharpoons{abc}\) `\xrightleftharpoons{abc}`
\(\xtofrom{abc}\) `\xtofrom{abc}`	\(\xmapsto{abc}\) `\xmapsto{abc}`
\(\xlongequal{abc}\) `\xlongequal{abc}`


\(\mathrm{Ab0}\) `\mathrm{Ab0}`	\(\mathbf{Ab0}\) `\mathbf{Ab0}`	\(\mathsf{Ab0}\) `\mathsf{Ab0}`
\(\mathnormal{Ab0}\) `\mathnormal{Ab0}`	\(\textbf{Ab0}\) `\textbf{Ab0}`	\(\textsf{Ab0}\) `\textsf{Ab0}`
\(\textrm{Ab0}\) `\textrm{Ab0}`	\(\bf Ab0\) `\bf Ab0`	\(\sf Ab0\) `\sf Ab0`
\(\rm Ab0\) `\rm Ab0`	\(\bold{Ab0}\) `\bold{Ab0}`	\(\mathsfit{Ab0}\) `\mathsfit{Ab0}`
\(\textnormal{Ab0}\) `\textnormal{Ab0}`	\(\boldsymbol{Ab0}\) `\boldsymbol{Ab0}`	\(\Bbb{AB}\) `\Bbb{AB}`
\(\text{Ab0}\) `\text{Ab0}`	\(\bm{Ab0}\) `\bm{Ab0}`	\(\mathbb{AB}\) `\mathbb{AB}`
\(\textup{Ab0}\) `\textup{Ab0}`	\(\textmd{Ab0}\) `\textmd{Ab0}`	\(\frak{Ab0}\) `\frak{Ab0}`
\(\mathit{Ab0}\) `\mathit{Ab0}`	\(\mathtt{Ab0}\) `\mathtt{Ab0}`	\(\mathfrak{Ab0}\) `\mathfrak{Ab0}`
\(\textit{Ab0}\) `\textit{Ab0}`	\(\texttt{Ab0}\) `\texttt{Ab0}`	\(\mathcal{AB0}\) `\mathcal{AB0}`
\(\it Ab0\) `\it Ab0`	\(\tt Ab0\) `\tt Ab0`	\(\cal AB0\) `\cal AB0`
\(\emph{Ab0}\) `\emph{Ab0}`		\(\mathscr{AB}\) `\mathscr{AB}`


\(\Huge AB\) `\Huge AB`	\(\normalsize AB\) `\normalsize AB`
\(\huge AB\) `\huge AB`	\(\small AB\) `\small AB`
\(\LARGE AB\) `\LARGE AB`	\(\footnotesize AB\) `\footnotesize AB`
\(\Large AB\) `\Large AB`	\(\scriptsize AB\) `\scriptsize AB`
\(\large AB\) `\large AB`	\(\tiny AB\) `\tiny AB`


\(+\) `+`	\(\cdot\) `\cdot`	\(\gtrdot\) `\gtrdot`	\(x \pmod a\) `x \pmod a`
\(-\) `-`	\(\cdotp\) `\cdotp`	\(\intercal\) `\intercal`	\(x \pod a\) `x \pod a`
\(/\) `/`	\(\centerdot\) `\centerdot`	\(\land\) `\land`	\(\rhd\) `\rhd`
\(\) ``	\(\circ\) `\circ`	\(\leftthreetimes\) `\leftthreetimes`	\(\rightthreetimes\) `\rightthreetimes`
\(\amalg\) `\amalg`	\(\circledast\) `\circledast`	\(\ldotp\) `\ldotp`	\(\rtimes\) `\rtimes`
\(\And\) `\And`	\(\circledcirc\) `\circledcirc`	\(\lor\) `\lor`	\(\setminus\) `\setminus`
\(\ast\) `\ast`	\(\circleddash\) `\circleddash`	\(\lessdot\) `\lessdot`	\(\smallsetminus\) `\smallsetminus`
\(\barwedge\) `\barwedge`	\(\Cup\) `\Cup`	\(\lhd\) `\lhd`	\(\sqcap\) `\sqcap`
\(\bigcirc\) `\bigcirc`	\(\cup\) `\cup`	\(\ltimes\) `\ltimes`	\(\sqcup\) `\sqcup`
\(\bmod\) `\bmod`	\(\curlyvee\) `\curlyvee`	\(x \mod a\) `x\mod a`	\(\times\) `\times`
\(\boxdot\) `\boxdot`	\(\curlywedge\) `\curlywedge`	\(\mp\) `\mp`	\(\unlhd\) `\unlhd`
\(\boxminus\) `\boxminus`	\(\div\) `\div`	\(\odot\) `\odot`	\(\unrhd\) `\unrhd`
\(\boxplus\) `\boxplus`	\(\divideontimes\) `\divideontimes`	\(\ominus\) `\ominus`	\(\uplus\) `\uplus`
\(\boxtimes\) `\boxtimes`	\(\dotplus\) `\dotplus`	\(\oplus\) `\oplus`	\(\vee\) `\vee`
\(\bullet\) `\bullet`	\(\doublebarwedge\) `\doublebarwedge`	\(\otimes\) `\otimes`	\(\veebar\) `\veebar`
\(\Cap\) `\Cap`	\(\doublecap\) `\doublecap`	\(\oslash\) `\oslash`	\(\wedge\) `\wedge`
\(\cap\) `\cap`	\(\doublecup\) `\doublecup`	\(\pm\) `\pm` 或 `\plusmn`	\(\wr\) `\wr`


\(\frac{a}{b}\) `\frac{a}{b}`	\(\tfrac{a}{b}\) `\tfrac{a}{b}`	\(\genfrac ( ] {2pt}{1}a{a+1}\) `\genfrac ( ] {2pt}{1}a{a+1}`
\({a \over b}\) `{a \over b}`	\(\dfrac{a}{b}\) `\dfrac{a}{b}`	\({a \above{2pt} b+1}\) `{a \above{2pt} b+1}`
\(a/b\) `a/b`		\(\cfrac{a}{1 + \cfrac{1}{b}}\) `\cfrac{a}{1 + \cfrac{1}{b}}`


\(\binom{n}{k}\) `\binom{n}{k}`	\(\dbinom{n}{k}\) `\dbinom{n}{k}`	\({n\brace k}\) `{n\brace k}`
\({n \choose k}\) `{n \choose k}`	\(\tbinom{n}{k}\) `\tbinom{n}{k}`	\({n\brack k}\) `{n\brack k}`


\(=\) `=`	\(\doteqdot\) `\doteqdot`	\(\lessapprox\) `\lessapprox`	\(\smile\) `\smile`
\(<\) `<`	\(\eqcirc\) `\eqcirc`	\(\lesseqgtr\) `\lesseqgtr`	\(\sqsubset\) `\sqsubset`
\(>\) `>`	\(\eqcolon\) `\eqcolon` 或 `\minuscolon`	\(\lesseqqgtr\) `\lesseqqgtr`	\(\sqsubseteq\) `\sqsubseteq`
\(:\) `:`	\(\Eqcolon\) `\Eqcolon` 或 `\minuscoloncolon`	\(\lessgtr\) `\lessgtr`	\(\sqsupset\) `\sqsupset`
\(\approx\) `\approx`	\(\eqqcolon\) `\eqqcolon` 或 `\equalscolon`	\(\lesssim\) `\lesssim`	\(\sqsupseteq\) `\sqsupseteq`
\(\approxcolon\) `\approxcolon`	\(\Eqqcolon\) `\Eqqcolon` 或 `\equalscoloncolon`	\(\ll\) `\ll`	\(\Subset\) `\Subset`
\(\approxcoloncolon\) `\approxcoloncolon`	\(\eqsim\) `\eqsim`	\(\lll\) `\lll`	\(\subset\) `\subset` 或 `\sub`
\(\approxeq\) `\approxeq`	\(\eqslantgtr\) `\eqslantgtr`	\(\llless\) `\llless`	\(\subseteq\) `\subseteq` 或 `\sube`
\(\asymp\) `\asymp`	\(\eqslantless\) `\eqslantless`	\(\lt\) `\lt`	\(\subseteqq\) `\subseteqq`
\(\backepsilon\) `\backepsilon`	\(\equiv\) `\equiv`	\(\mid\) `\mid`	\(\succ\) `\succ`
\(\backsim\) `\backsim`	\(\fallingdotseq\) `\fallingdotseq`	\(\models\) `\models`	\(\succapprox\) `\succapprox`
\(\backsimeq\) `\backsimeq`	\(\frown\) `\frown`	\(\multimap\) `\multimap`	\(\succcurlyeq\) `\succcurlyeq`
\(\between\) `\between`	\(\ge\) `\ge`	\(\origof\) `\origof`	\(\succeq\) `\succeq`
\(\bowtie\) `\bowtie`	\(\geq\) `\geq`	\(\owns\) `\owns`	\(\succsim\) `\succsim`
\(\bumpeq\) `\bumpeq`	\(\geqq\) `\geqq`	\(\parallel\) `\parallel`	\(\Supset\) `\Supset`
\(\Bumpeq\) `\Bumpeq`	\(\geqslant\) `\geqslant`	\(\perp\) `\perp`	\(\supset\) `\supset`
\(\circeq\) `\circeq`	\(\gg\) `\gg`	\(\pitchfork\) `\pitchfork`	\(\supseteq\) `\supseteq` 或 `\supe`
\(\colonapprox\) `\colonapprox`	\(\ggg\) `\ggg`	\(\prec\) `\prec`	\(\supseteqq\) `\supseteqq`
\(\Colonapprox\) `\Colonapprox` 或 `\coloncolonapprox`	\(\gggtr\) `\gggtr`	\(\precapprox\) `\precapprox`	\(\thickapprox\) `\thickapprox`
\(\coloneq\) `\coloneq` 或 `\colonminus`	\(\gt\) `\gt`	\(\preccurlyeq\) `\preccurlyeq`	\(\thicksim\) `\thicksim`
\(\Coloneq\) `\Coloneq` 或 `\coloncolonminus`	\(\gtrapprox\) `\gtrapprox`	\(\preceq\) `\preceq`	\(\trianglelefteq\) `\trianglelefteq`
\(\coloneqq\) `\coloneqq` 或 `\colonequals`	\(\gtreqless\) `\gtreqless`	\(\precsim\) `\precsim`	\(\triangleq\) `\triangleq`
\(\Coloneqq\) `\Coloneqq` 或 `\coloncolonequals`	\(\gtreqqless\) `\gtreqqless`	\(\propto\) `\propto`	\(\trianglerighteq\) `\trianglerighteq`
\(\colonsim\) `\colonsim`	\(\gtrless\) `\gtrless`	\(\risingdotseq\) `\risingdotseq`	\(\varpropto\) `\varpropto`
\(\Colonsim\) `\Colonsim` 或 `\coloncolonsim`	\(\gtrsim\) `\gtrsim`	\(\shortmid\) `\shortmid`	\(\vartriangle\) `\vartriangle`
\(\cong\) `\cong`	\(\imageof\) `\imageof`	\(\shortparallel\) `\shortparallel`	\(\vartriangleleft\) `\vartriangleleft`
\(\curlyeqprec\) `\curlyeqprec`	\(\in\) `\in` 或 `\isin`	\(\sim\) `\sim`	\(\vartriangleright\) `\vartriangleright`
\(\curlyeqsucc\) `\curlyeqsucc`	\(\Join\) `\Join`	\(\simcolon\) `\simcolon`	\(\vcentcolon\) `\vcentcolon` 或 `\ratio`
\(\dashv\) `\dashv`	\(\le\) `\le`	\(\simcoloncolon\) `\simcoloncolon`	\(\vdash\) `\vdash`
\(\dblcolon\) `\dblcolon` 或 `\coloncolon`	\(\leq\) `\leq`	\(\simeq\) `\simeq`	\(\vDash\) `\vDash`
\(\doteq\) `\doteq`	\(\leqq\) `\leqq`	\(\smallfrown\) `\smallfrown`	\(\Vdash\) `\Vdash`
\(\Doteq\) `\Doteq`	\(\leqslant\) `\leqslant`	\(\smallsmile\) `\smallsmile`	\(\Vvdash\) `\Vvdash`


\(\gnapprox\) `\gnapprox`	\(\ngeqslant\) `\ngeqslant`	\(\nsubseteq\) `\nsubseteq`	\(\precneqq\) `\precneqq`
\(\gneq\) `\gneq`	\(\ngtr\) `\ngtr`	\(\nsubseteqq\) `\nsubseteqq`	\(\precnsim\) `\precnsim`
\(\gneqq\) `\gneqq`	\(\nleq\) `\nleq`	\(\nsucc\) `\nsucc`	\(\subsetneq\) `\subsetneq`
\(\gnsim\) `\gnsim`	\(\nleqq\) `\nleqq`	\(\nsucceq\) `\nsucceq`	\(\subsetneqq\) `\subsetneqq`
\(\gvertneqq\) `\gvertneqq`	\(\nleqslant\) `\nleqslant`	\(\nsupseteq\) `\nsupseteq`	\(\succnapprox\) `\succnapprox`
\(\lnapprox\) `\lnapprox`	\(\nless\) `\nless`	\(\nsupseteqq\) `\nsupseteqq`	\(\succneqq\) `\succneqq`
\(\lneq\) `\lneq`	\(\nmid\) `\nmid`	\(\ntriangleleft\) `\ntriangleleft`	\(\succnsim\) `\succnsim`
\(\lneqq\) `\lneqq`	\(\notin\) `\notin`	\(\ntrianglelefteq\) `\ntrianglelefteq`	\(\supsetneq\) `\supsetneq`
\(\lnsim\) `\lnsim`	\(\notni\) `\notni`	\(\ntriangleright\) `\ntriangleright`	\(\supsetneqq\) `\supsetneqq`
\(\lvertneqq\) `\lvertneqq`	\(\nparallel\) `\nparallel`	\(\ntrianglerighteq\) `\ntrianglerighteq`	\(\varsubsetneq\) `\varsubsetneq`
\(\ncong\) `\ncong`	\(\nprec\) `\nprec`	\(\nvdash\) `\nvdash`	\(\varsubsetneqq\) `\varsubsetneqq`
\(\ne\) `\ne`	\(\npreceq\) `\npreceq`	\(\nvDash\) `\nvDash`	\(\varsupsetneq\) `\varsupsetneq`
\(\neq\) `\neq`	\(\nshortmid\) `\nshortmid`	\(\nVDash\) `\nVDash`	\(\varsupsetneqq\) `\varsupsetneqq`
\(\ngeq\) `\ngeq`	\(\nshortparallel\) `\nshortparallel`	\(\nVdash\) `\nVdash`
\(\ngeqq\) `\ngeqq`	\(\nsim\) `\nsim`	\(\precnapprox\) `\precnapprox`


\(\circlearrowleft\) `\circlearrowleft`	\(\leftharpoonup\) `\leftharpoonup`	\(\rArr\) `\rArr`
\(\circlearrowright\) `\circlearrowright`	\(\leftleftarrows\) `\leftleftarrows`	\(\rarr\) `\rarr`
\(\curvearrowleft\) `\curvearrowleft`	\(\leftrightarrow\) `\leftrightarrow`	\(\restriction\) `\restriction`
\(\curvearrowright\) `\curvearrowright`	\(\Leftrightarrow\) `\Leftrightarrow`	\(\rightarrow\) `\rightarrow`
\(\Darr\) `\Darr`	\(\leftrightarrows\) `\leftrightarrows`	\(\Rightarrow\) `\Rightarrow`
\(\dArr\) `\dArr`	\(\leftrightharpoons\) `\leftrightharpoons`	\(\rightarrowtail\) `\rightarrowtail`
\(\darr\) `\darr`	\(\leftrightsquigarrow\) `\leftrightsquigarrow`	\(\rightharpoondown\) `\rightharpoondown`
\(\dashleftarrow\) `\dashleftarrow`	\(\Lleftarrow\) `\Lleftarrow`	\(\rightharpoonup\) `\rightharpoonup`
\(\dashrightarrow\) `\dashrightarrow`	\(\longleftarrow\) `\longleftarrow`	\(\rightleftarrows\) `\rightleftarrows`
\(\downarrow\) `\downarrow`	\(\Longleftarrow\) `\Longleftarrow`	\(\rightleftharpoons\) `\rightleftharpoons`
\(\Downarrow\) `\Downarrow`	\(\longleftrightarrow\) `\longleftrightarrow`	\(\rightrightarrows\) `\rightrightarrows`
\(\downdownarrows\) `\downdownarrows`	\(\Longleftrightarrow\) `\Longleftrightarrow`	\(\rightsquigarrow\) `\rightsquigarrow`
\(\downharpoonleft\) `\downharpoonleft`	\(\longmapsto\) `\longmapsto`	\(\Rrightarrow\) `\Rrightarrow`
\(\downharpoonright\) `\downharpoonright`	\(\longrightarrow\) `\longrightarrow`	\(\Rsh\) `\Rsh`
\(\gets\) `\gets`	\(\Longrightarrow\) `\Longrightarrow`	\(\searrow\) `\searrow`
\(\Harr\) `\Harr`	\(\looparrowleft\) `\looparrowleft`	\(\swarrow\) `\swarrow`
\(\hArr\) `\hArr`	\(\looparrowright\) `\looparrowright`	\(\to\) `\to`
\(\harr\) `\harr`	\(\Lrarr\) `\Lrarr`	\(\twoheadleftarrow\) `\twoheadleftarrow`
\(\hookleftarrow\) `\hookleftarrow`	\(\lrArr\) `\lrArr`	\(\twoheadrightarrow\) `\twoheadrightarrow`
\(\hookrightarrow\) `\hookrightarrow`	\(\lrarr\) `\lrarr`	\(\Uarr\) `\Uarr`
\(\iff\) `\iff`	\(\Lsh\) `\Lsh`	\(\uArr\) `\uArr`
\(\impliedby\) `\impliedby`	\(\mapsto\) `\mapsto`	\(\uarr\) `\uarr`
\(\implies\) `\implies`	\(\nearrow\) `\nearrow`	\(\uparrow\) `\uparrow`
\(\Larr\) `\Larr`	\(\nleftarrow\) `\nleftarrow`	\(\Uparrow\) `\Uparrow`
\(\lArr\) `\lArr`	\(\nLeftarrow\) `\nLeftarrow`	\(\updownarrow\) `\updownarrow`
\(\larr\) `\larr`	\(\nleftrightarrow\) `\nleftrightarrow`	\(\Updownarrow\) `\Updownarrow`
\(\leadsto\) `\leadsto`	\(\nLeftrightarrow\) `\nLeftrightarrow`	\(\upharpoonleft\) `\upharpoonleft`
\(\leftarrow\) `\leftarrow`	\(\nrightarrow\) `\nrightarrow`	\(\upharpoonright\) `\upharpoonright`
\(\Leftarrow\) `\Leftarrow`	\(\nRightarrow\) `\nRightarrow`	\(\upuparrows\) `\upuparrows`
\(\leftarrowtail\) `\leftarrowtail`	\(\nwarrow\) `\nwarrow`
\(\leftharpoondown\) `\leftharpoondown`	\(\Rarr\) `\Rarr`


\(\bra{\phi}\) `\bra{\phi}`	\(\ket{\psi}\) `\ket{\psi}`	\(\braket{\phi\VERT\psi}\) `\braket{\phi\|\psi}`
\(\Bra{\phi}\) `\Bra{\phi}`	\(\Ket{\psi}\) `\Ket{\psi}`	\(\Braket{ ϕ \VERT \frac{∂^2}{∂ t^2} \VERT ψ }\) `\Braket{ ϕ \| \frac{∂^2}{∂ t^2} \| ψ }`


`% comment`	\(\dots\) `\dots`	\(\KaTeX\) `\KaTeX`
\(\%\) `\%`	\(\cdots\) `\cdots`	\(\LaTeX\) `\LaTeX`
\(\#\) `\#`	\(\ddots\) `\ddots`	\(\TeX\) `\TeX`
\(\&\) `\&`	\(\ldots\) `\ldots`	\(\nabla\) `\nabla`
\(\_\) `\_`	\(\vdots\) `\vdots`	\(\infty\) `\infty`
\(\text{\textunderscore}\) `\text{\textunderscore}`	\(\dotsb\) `\dotsb`	\(\infin\) `\infin`
$\text~~}$ `\text{`~~	\(\dotsc\) `\dotsc`	\(\checkmark\) `\checkmark`
\(\text{\textendash}\) `\text{\textendash}`	\(\dotsi\) `\dotsi`	\(\dag\) `\dag`
$\text~~-}$ `\text{-`~~	\(\dotsm\) `\dotsm`	\(\dagger\) `\dagger`
\(\text{\textemdash}\) `\text{\textemdash}`	\(\dotso\) `\dotso`	\(\text{\textdagger}\) `\text{\textdagger}`
\(\text{\textasciitilde}\) `\text{\textasciitilde}`	\(\sdot\) `\sdot`	\(\ddag\) `\ddag`
\(\text{\textasciicircum}\) `\text{\textasciicircum}`	\(\mathellipsis\) `\mathellipsis`	\(\ddagger\) `\ddagger`
$`$ <code>`	\(\text{\textellipsis}\) `\text{\textellipsis}`	\(\text{\textdaggerdbl}\) `\text{\textdaggerdbl}`
\(\text{\textquoteleft}\) `\text{\textquoteleft}`	\(\Box\) `\Box`	\(\Dagger\) `\Dagger`
\(\lq\) `\lq`	\(\square\) `\square`	\(\angle\) `\angle`
\(\text{\textquoteright}\) `\text{\textquoteright}`	\(\blacksquare\) `\blacksquare`	\(\measuredangle\) `\measuredangle`
\(\rq\) `\rq`	\(\triangle\) `\triangle`	\(\sphericalangle\) `\sphericalangle`
\(\text{\textquotedblleft}\) `\text{\textquotedblleft}`	\(\triangledown\) `\triangledown`	\(\top\) `\top`
\("\) `"`	\(\triangleleft\) `\triangleleft`	\(\bot\) `\bot`
\(\text{\textquotedblright}\) `\text{\textquotedblright}`	\(\triangleright\) `\triangleright`	\(\$\) `\$`
\(\colon\) `\colon`	\(\bigtriangledown\) `\bigtriangledown`	\(\text{\textdollar}\) `\text{\textdollar}`
\(\backprime\) `\backprime`	\(\bigtriangleup\) `\bigtriangleup`	\(\pounds\) `\pounds`
\(\prime\) `\prime`	\(\blacktriangle\) `\blacktriangle`	\(\mathsterling\) `\mathsterling`
\(\text{\textless}\) `\text{\textless}`	\(\blacktriangledown\) `\blacktriangledown`	\(\text{\textsterling}\) `\text{\textsterling}`
\(\text{\textgreater}\) `\text{\textgreater}`	\(\blacktriangleleft\) `\blacktriangleleft`	\(\yen\) `\yen`
\(\text{\textbar}\) `\text{\textbar}`	\(\blacktriangleright\) `\blacktriangleright`	\(\surd\) `\surd`
\(\text{\textbardbl}\) `\text{\textbardbl}`	\(\diamond\) `\diamond`	\(\degree\) `\degree`
\(\text{\textbraceleft}\) `\text{\textbraceleft}`	\(\Diamond\) `\Diamond`	\(\text{\textdegree}\) `\text{\textdegree}`
\(\text{\textbraceright}\) `\text{\textbraceright}`	\(\lozenge\) `\lozenge`	\(\mho\) `\mho`
\(\text{\textbackslash}\) `\text{\textbackslash}`	\(\blacklozenge\) `\blacklozenge`	\(\diagdown\) `\diagdown`
\(\text{\P}\) `\text{\P}` 或 `\P`	\(\star\) `\star`	\(\diagup\) `\diagup`
\(\text{\S}\) `\text{\S}` 或 `\S`	\(\bigstar\) `\bigstar`	\(\flat\) `\flat`
\(\text{\sect}\) `\text{\sect}`	\(\clubsuit\) `\clubsuit`	\(\natural\) `\natural`
\(\copyright\) `\copyright`	\(\clubs\) `\clubs`	\(\sharp\) `\sharp`
\(\circledR\) `\circledR`	\(\diamondsuit\) `\diamondsuit`	\(\heartsuit\) `\heartsuit`
\(\text{\textregistered}\) `\text{\textregistered}`	\(\diamonds\) `\diamonds`	\(\hearts\) `\hearts`
\(\circledS\) `\circledS`	\(\spadesuit\) `\spadesuit`	\(\spades\) `\spades`
\(\text{\textcircled a}\) `\text{\textcircled a}`	\(\maltese\) `\maltese`	\(\minuso\) `\minuso`

单位	textstyle	scriptscript	huge
em 或 ex	\(\rule{1em}{1em}\)	\(\scriptscriptstyle\rule{1em}{1em}\)	\(\huge\rule{1em}{1em}\)
mu	\(\rule{18mu}{18mu}\)	\(\scriptscriptstyle\rule{18mu}{18mu}\)	\(\huge\rule{18mu}{18mu}\)
其他	\(\rule{10pt}{10pt}\)	\(\scriptscriptstyle\rule{10pt}{10pt}\)	\(\huge\rule{10pt}{10pt}\)