KaTeX数学公式语法

Supported Functions 支持功能

There is a similar Support Table, sorted alphabetically, that lists both supported and un-supported functions.

还有一个类似的功能列表，按字母顺序排列，列出了受支持和不受支持的函数。

Accents 强调


$a^{'}$ `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}`
$\grave{a}$ `\grave{a}`	$\overline{AB}$ `\overline{AB}`	$\overlinesegment{AB}$ `\overlinesegment{AB}`
$\hat{\theta}$ `\hat{\theta}`	$\underline{AB}$ `\underline{AB}`	$\underlinesegment{AB}$ `\underlinesegment{AB}`
$\widehat{ac}$ `\widehat{ac}`	$\widecheck{ac}$ `\widecheck{ac}`

Accent functions inside \text{…}
\text{…}格式的强调函数


$\text{\'{a}}$ `\'{a}`	$\text{\~{a}}$ `\~{a}`	$\text{\.{a}}$ `\.{a}`	$\text{\H{a}}$ `\H{a}`
$\text{\`{a}}$ \`{a}	$\text{\={a}}$ `\={a}`	$\text{\”{a}}$ `\"{a}`	$\text{\v{a}}$ `\v{a}`
$\text{\^{a}}$ `\^{a}`	$\text{\u{a}}$ `\u{a}`	$\text{\r{a}}$ `\r{a}`

Delimiters 分隔符


$()$ `( )`	$\lparen~\rparen$ `\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`	$\lt~\gt$ `\lt \gt`	$[[]]$ `⟦ ⟧`	$\llbracket~\rrbracket$ `\llbracket` `\rrbracket`	$\lBrace~\rBrace$ `\lBrace \rBrace`

Delimiter Sizing
分隔符大小

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

Environments 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}`
$\begin{aligned} a&=b+c \\ d+e&=f \end{aligned}$	`\begin{aligned}` `a&=b+c \\` `d+e&=f` `\end{aligned}`	$\begin{alignedat}{2}10&x+&3&y=2\\3&x+&13&y=4\end{alignedat}$	`\begin{alignedat}{2}` `10&x+ &3&y = 2 \\` `3&x+&13&y = 4` `\end{alignedat}`
$\begin{gathered} a=b \\ e=b+c \end{gathered}$	`\begin{gathered}` `a=b \\` `e=b+c` `\end{gathered}`	$\begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$	`x = \begin{cases}` `a &\text{if } b \\` `c &\text{if } d` `\end{cases}`
$KaTeX parse error: No such environment: smallmatrix at position 7: \begin{̲s̲m̲a̲l̲l̲m̲a̲t̲r̲i̲x̲}̲ a & b \\ c & d…$	`\begin{smallmatrix}` `a & b \\` `c & d` `\end{smallmatrix}`	$KaTeX parse error: No such environment: rcases at position 7: \begin{̲r̲c̲a̲s̲e̲s̲}̲ a &\text{if } …$	`\begin{rcases}` `a &\text{if } b \\` `c &\text{if } d` `\end{rcases}⇒…`

KaTeX also supports darray, dcases, and drcases.
KaTeX还支持darray、dcases和drcases。

Acceptable line separators include: \\, \cr, \\[distance], and \cr[distance]. Distance can be written with any of the KaTeX units.
支持的行分隔符包括:\\, \cr, \\[distance], 和 \cr[distance]。Distance可以用任何KaTeX units表示。

The {array} environment supports | and : vertical separators.
{array}环境支持|和:垂直分隔符。

The {array} environment does not yet support \cline or \multicolumn.
{array}环境当前不支持\cline 或 \multicolumn。

HTML

The following “raw HTML” features are potentially dangerous for untrusted inputs, so they are disabled by default, and attempting to use them produces the command names in red (which you can configure via the errorColor option). To fully trust your LaTeX input, you need to pass an option of trust: true; you can also enable just some of the commands
or for just some URLs via the trust option.
下面的“原始HTML”特性对于不受信任的输入可能是危险的，因此它们在默认情况下是禁用的，尝试使用它们会产生红色的命令名（您可以通过errorColor option来配置）。要完全信任LaTeX输入，您需要传递一个trust: true选项;您还可以启用其中的一些命令或者只是通过’信任’选项的一些URL。（PS：此处配置是针对Katex开发者）


$\href{https://katex.org/}{\KaTeX}$	`\href{https://katex.org/}{\KaTeX}`
$\url{https://katex.org/}$	`\url{https://katex.org/}`
$KaTeX parse error: Undefined control sequence: \includegraphics at position 1: \̲i̲n̲c̲l̲u̲d̲e̲g̲r̲a̲p̲h̲i̲c̲s̲[height=0.8em, …$	`\includegraphics[height=0.8em, totalheight=0.9em, width=0.9em, alt=KA logo]{https://katex.org/img/khan-academy.png}`
$KaTeX parse error: Undefined control sequence: \htmlId at position 1: \̲h̲t̲m̲l̲I̲d̲{bar}{x}$	`\htmlId{bar}{x}`
$KaTeX parse error: Undefined control sequence: \htmlClass at position 1: \̲h̲t̲m̲l̲C̲l̲a̲s̲s̲{foo}{x}$	`\htmlClass{foo}{x}`
$KaTeX parse error: Undefined control sequence: \htmlStyle at position 1: \̲h̲t̲m̲l̲S̲t̲y̲l̲e̲{color: red;}{x…$	`\htmlStyle{color: red;}{x}`
$KaTeX parse error: Undefined control sequence: \htmlData at position 1: \̲h̲t̲m̲l̲D̲a̲t̲a̲{foo=a, bar=b}{…$	`\htmlData{foo=a, bar=b}{x}`

\includegraphics supports height, width, totalheight, and alt in its first argument. height is required.
\includegraphics 第一个参数支持 height, width, totalheight, 和 alt . height 是必需的。

HTML extension (\html-prefixed) commands are non-standard, so loosening strict option for htmlExtension is required.
HTML扩展(\ HTML前缀)命令是非标准的，因此需要对设置中的strict->htmlExtension参数进行配置才能用。（PS：此处配置是针对Katex开发者）

Letters and Unicode 字母和Unicode

Greek Letters
希腊字母

Direct Input : $\allowbreak Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω$ $\allowbreak α β γ δ ϵ ζ η θ ι κ λ μ ν ξ o π \allowbreak ρ σ τ υ ϕ χ ψ ω ε ϑ ϖ ϱ ς φ ϝ$
可以直接输入上面的字母


$\Alpha$ `\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`

Other Letters
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}`

Direct Input: $\partial \nabla ℑ Ⅎ ℵ ℶ ℷ ℸ ⅁ ℏ ð$ ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖÙÚÛÜÝÞßàáâãäåçèéêëìíîïðñòóôöùúûüýþÿ
可以直接输入上面的字母

Unicode Mathematical Alphanumeric Symbols
Unicode数学字母数字符号

下图是原符号，看样子CSDN的KaTex版本不支持显示

Item	Range	Item	Range
Bold	?-? ?-? ?-?	Double-struck	?-ℤ ?
Italic	?-? ?-?	Sans serif	?-? ?-? ?-?
Bold Italic	?-? ?-?	Sans serif bold	?-? ?-? ?-?
Script	?-?	Sans serif italic	?-? ?-?
Fractur	?-?	Monospace	?-? ?-? ?-?

Unicode

If the KaTeX rendering mode is set to strict: false or strict: "warn" (default), then KaTeX will accept all Unicode letters in both text and math mode.
如果KaTeX渲染模式设置为strict: false 或 strict: "warn"(默认)，那么KaTeX将接受所有的Unicode字符，包括文本和数学模式。

Layout 布局

Annotation 注释


$\cancel{5}$ `\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 =`
$\sout{abc}$ `\sout{abc}`	$\boxed{\pi=\frac c d}$ `\boxed{\pi=\frac c d}`

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

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

Line Breaks 换行符

KaTeX 0.10.0+ will insert automatic line breaks in inline math after relations or binary operators such as “=” or “+”. These can be suppressed by \nobreak or by placing math inside a pair of braces, as in {F=ma}. \allowbreak will allow automatic line breaks at locations other than relations or operators.
KaTeX 0.10.0之后的版本将在关系或二进制操作符(如“=”或“+”)之后插入自动换行符。可以通过 \nobreak或用大括号来阻止，如{F=ma}。\allowbreak将允许在关系或操作符以外的位置自动换行。

Hard line breaks are \\ and \newline.
硬换行符是\\ 和 \newline。

In display math, KaTeX does not insert automatic line breaks. It ignores display math hard line breaks when rendering option strict: true.
在显示数学公式时，KaTeX不插入自动换行符。当渲染选项strict: true时，它会忽略硬换行符。

Vertical Layout 垂直布局


$x_n$ `x_n`	$\stackrel{!}{=}$ `\stackrel{!}{=}`	$\atop b$ `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{!}{=}`	$\sum\limits_{0 0<j<n0<i<m∑$

PS：下面这个用不了，用\sum\limits_{0 代替 $\sum\limits_{0 0<j<n0<i<m∑$


The second argument of \raisebox can contain math if it is nested within $…$ delimiters, as in \raisebox{0.25em}{$\frac a b$}
 '\raisebox’的第二个参数可以包含数学，如果它嵌套在$…$分隔符内，如\raisebox{0.25em}{$\frac a b$}

Overlap and Spacing 重叠和间距









 ${=}\mathllap{/\,}$  {=}\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 also supports \llap, \rlap, and \clap, but they will take only text, not math, as arguments.
 KaTeX也支持\llap, \rlap, and \clap，但是它们的参数只接受文本，不接受数学。


Spacing
 间距




Function
Produces
Function
Produces




\,
³∕₁₈ em space
\kern{distance}
space, width = distance


\thinspace
³∕₁₈ em space
\mkern{distance}
space, width = distance


\>
⁴∕₁₈ em space
\mskip{distance}
space, width = distance


\:
⁴∕₁₈ em space
\hskip{distance}
space, width = distance


\medspace
⁴∕₁₈ em space
\hspace{distance}
space, width = distance


\;
⁵∕₁₈ em space
\hspace*{distance}
space, width = distance


\thickspace
⁵∕₁₈ em space
\phantom{content}
space the width and height of content


\enspace
½ em space
\hphantom{content}
space the width of content


\quad
1 em space
\vphantom{content}
a strut the height of content


\uad
2 em space
\!
– ³∕₁₈ em space


~
non-breaking space
\negthinspace
– ³∕₁₈ em space


\

        
space
\negmedspace
– ⁴∕₁₈ em space


\nobreakspace
non-breaking space
\negthickspace
– ⁵∕₁₈ em space


\space
space





Notes:
 注意:
 distance will accept any of the KaTeX units.
 distance接受任何KaTeX单位。



\kern, \mkern, \mskip, and \hspace accept unbraced distances, as in: \kern1em.
 \kern, \mkern, \mskip, and \hspace 接受宽松的写法如： \kern1em.

\mkern and \mskip will not work in text mode and both will write a console warning for any unit except mu.
 \mkern 和 \mskip在文本模式下无效，除了 mu，其他的单位都会在控制台输出警告。


Logic and Set Theory 逻辑与集合论











 $\forall$  \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 or \lnot



Direct Input:  $\forall ∴ ∁ ∵ \exists ∣ \in \in / ∋ \subset \supset \land \lor \mapsto \to \leftarrow \leftrightarrow \neg$  ℂ ℍ ℕ ℙ ℚ ℝ
 可以直接输入上面的符号

Macros 宏









 $\def\foo{x^2} \foo + \foo$ 
\def\foo{x^2} \foo + \foo


 $\gdef\bar#1{#1^2} \bar{y} + \bar{y}$ 
\gdef\bar#1{#1^2} \bar{y} + \bar{y}



\global\def\macroname#1#2…{definition}



\newcommand\macroname[numargs]{definition}



\renewcommand\macroname[numargs]{definition}



\providecommand\macroname[numargs]{definition}



\gdef and \global\def macros will persist between math expressions.
 \gdef and \global\def宏具有全局性，在数学表达式之间持久存在。

\char \mathchoice \TextOrMath \@ifstar \@ifnextchar \@firstoftwo \@secondoftwo \relax
@ is a valid character for commands, as if \makeatletter were in effect.
 @是命令的有效字符，就好像 \makeatletter 是有效的一样。

Operators 运算符
Big Operators 大运算符











 $\sum$  \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



Direct Input:  $\int \iint ∭ \oint \prod ∐ \sum ⋀ ⋁ ⋂ ⋃ ⨀ ⨁ ⨂ ⨄ ⨆$ 
 也可以直接输入上述符号

Binary Operators 二元运算符











 $+$  +
 $\cdot$  \cdot
 $\gtrdot$  \gtrdot
 $\pmod a$  x \pmod a


 $-$  -
 $\cdotp$  \cdotp
 $\intercal$  \intercal
 $\pod a$  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
 $\mod a$  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 or \plusmn
 $\wr$  \wr



Direct Input:  $+ - / * \cdot \pm \times \div \mp ∔ \land \lor \cap \cup ≀ ⊎ ⊓ ⊔ \oplus ⊖ \otimes ⊘ ⊙ ⊚ ⊛ ⊝$ 
 也可以直接输入上述符号

Fractions and Binomials 分数和二项式










 $\frac{a}{b}$  \frac{a}{b}
 $\tfrac{a}{b}$  \tfrac{a}{b}
 $\genfrac ( ] {2pt}{1}a{a+1}$  \genfrac ( ] {2pt}{1}a{a+1}


 $\over b}$  {a \over b}
 $\dfrac{a}{b}$  \dfrac{a}{b}
 $\above{2pt} b+1}$  {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}


 $\choose k}$  {n \choose k}
 $\tbinom{n}{k}$  \tbinom{n}{k}
 ${n\brack k}$  {n\brack k}



Math Operators 数学运算符











 $\arcsin$  \arcsin
 $\cotg$  \cotg
 $\ln$  \ln
 $\det$  \det


 $\arccos$  \arccos
 $\coth$  \coth
 $\log$  \log
 $\gcd$  \gcd


 $\arctan$  \arctan
 $\csc$  \csc
 $\sec$  \sec
 $\inf$  \inf


 $\arctg$  \arctg
 $\ctg$  \ctg
 $\sin$  \sin
 $\lim$  \lim


 $\arcctg$  \arcctg
 $\cth$  \cth
 $\sinh$  \sinh
 $\liminf$  \liminf


 $\arg$  \arg
 $\deg$  \deg
 $\sh$  \sh
 $\limsup$  \limsup


 $\ch$  \ch
 $\dim$  \dim
 $\tan$  \tan
 $\max$  \max


 $\cos$  \cos
 $\exp$  \exp
 $\tanh$  \tanh
 $\min$  \min


 $\cosec$  \cosec
 $\hom$  \hom
 $\tg$  \tg
 $\Pr$  \Pr


 $\cosh$  \cosh
 $\ker$  \ker
 $\th$  \th
 $\sup$  \sup


 $\cot$  \cot
 $\lg$  \lg
 $\argmax$  \argmax
 $\argmin$  \argmin


 $p l i m$  \plim
 $\operatorname{f}$  \operatorname{f}
 $\operatorname*{f}$  \operatorname*{f}




（PS：不支持 $p l i m$ ）
 Functions on the right column of this table can take \limits.
 此表右列中的函数可以接受\limits。


\sqrt 平方根
 $\sqrt{x}$  \sqrt{x}
 $\sqrt[3]{x}$  \sqrt[3]{x}
Relations 关系符
 $\stackrel{!}{=}$  \stackrel{!}{=}











 $=$  =
 $\eqcirc$  \eqcirc
 $\lesseqgtr$  \lesseqgtr
 $\sqsupset$  \sqsupset


 $<$  <
 $\eqcolon$  \eqcolon
 $\lessegtr$  \lessegtr
 $\sqsupseteq$  \sqsupseteq


 $>$  >
 $\Eqcolon$  \Eqcolon
 $\lessgtr$  \lessgtr
 $\Subset$  \Subset


 $:$  :
 $\ecolon$  \ecolon
 $\lesssim$  \lesssim
 $\subset$  \subset or \sub


 $\approx$  \approx
 $\Ecolon$  \Ecolon
 $\ll$  \ll
 $\subseteq$  \subseteq or \sube


 $\approxeq$  \approxeq
 $\eqsim$  \eqsim
 $\lll$  \lll
 $\subsete$  \subsete


 $\asymp$  \asymp
 $\eqslantgtr$  \eqslantgtr
 $\llless$  \llless
 $\succ$  \succ


 $\backepsilon$  \backepsilon
 $\eqslantless$  \eqslantless
 $\lt$  \lt
 $\succapprox$  \succapprox


 $\backsim$  \backsim
 $\equiv$  \equiv
 $\mid$  \mid
 $\succcurlyeq$  \succcurlyeq


 $\backsimeq$  \backsimeq
 $\fallingdotseq$  \fallingdotseq
 $\models$  \models
 $\succeq$  \succeq


 $\between$  \between
 $\frown$  \frown
 $\multimap$  \multimap
 $\succsim$  \succsim


 $\bowtie$  \bowtie
 $\ge$  \ge
 $\owns$  \owns
 $\Supset$  \Supset


 $\bumpeq$  \bumpeq
 $\geq$  \geq
 $\parallel$  \parallel
 $\supset$  \supset


 $\Bumpeq$  \Bumpeq
 $\ge$  \ge
 $\perp$  \perp
 $\supseteq$  \supseteq or \supe


 $\circeq$  \circeq
 $\geqslant$  \geqslant
 $\pitchfork$  \pitchfork
 $\supsete$  \supsete


 $\colonapprox$  \colonapprox
 $\gg$  \gg
 $\prec$  \prec
 $\thickapprox$  \thickapprox


 $\Colonapprox$  \Colonapprox
 $\ggg$  \ggg
 $\precapprox$  \precapprox
 $\thicksim$  \thicksim


 $\coloneq$  \coloneq
 $\gggtr$  \gggtr
 $\preccurlyeq$  \preccurlyeq
 $\trianglelefteq$  \trianglelefteq


 $\Coloneq$  \Coloneq
 $\gt$  \gt
 $\preceq$  \preceq
 $\triangleq$  \triangleq


 $\colone$  \colone
 $\gtrapprox$  \gtrapprox
 $\precsim$  \precsim
 $\trianglerighteq$  \trianglerighteq


 $\Colone$  \Colone
 $\gtreqless$  \gtreqless
 $\propto$  \propto
 $\varpropto$  \varpropto


 $\colonsim$  \colonsim
 $\gtreless$  \gtreless
 $\risingdotseq$  \risingdotseq
 $\vartriangle$  \vartriangle


 $\Colonsim$  \Colonsim
 $\gtrless$  \gtrless
 $\shortmid$  \shortmid
 $\vartriangleleft$  \vartriangleleft


 $\cong$  \cong
 $\gtrsim$  \gtrsim
 $\shortparallel$  \shortparallel
 $\vartriangleright$  \vartriangleright


 $\curlyeqprec$  \curlyeqprec
 $\in$  \in or \isin
 $\sim$  \sim
 $\vcentcolon$  \vcentcolon


 $\curlyeqsucc$  \curlyeqsucc
 $\Join$  \Join
 $\simeq$  \simeq
 $\vdash$  \vdash


 $\dashv$  \dashv
 $\le$  \le
 $\smallfrown$  \smallfrown
 $\vDash$  \vDash


 $\dblcolon$  \dblcolon
 $\leq$  \leq
 $\smallsmile$  \smallsmile
 $\Vdash$  \Vdash


 $\doteq$  \doteq
 $\le$  \le
 $\smile$  \smile
 $\Vvdash$  \Vvdash


 $\Doteq$  \Doteq
 $\leqslant$  \leqslant
 $\sqsubset$  \sqsubset



 $\doteqdot$  \doteqdot
 $\lessapprox$  \lessapprox
 $\sqsubseteq$  \sqsubseteq




Direct Input:  $= < > : \in ∋ \propto \sim ∽ ≂ ≃ ≅ \approx ≊ ≍ ≎ ≏ ≐ ≑ ≒ ≓ ≖ ≗ ≜ \equiv \leq \geq ≦ ≧ ≫ ≬ ≳ ≷ ≺ ≻ ≼ ≽ ≾ ≿ \subset \supset \subseteq \supseteq ⊏ ⊐ ⊑ ⊒ ⊢ ⊣ ⊩ ⊪ ⊸ ⋈ ⋍ ⋐ ⋑ ⋔ ⋙ ⋛ ⋞ ⋟ ⌢ ⌣ ⩾ ⪆ ⪌ ⪕ ⪖ ⪯ ⪰ ⪷ ⪸ ⫅ ⫆ ≲ ⩽ ⪅ ≶ ⋚ ⪋ ⊥ ⊨$  ≔ ≕ ⩴
 上述符号可以直接输入

Negated Relations 否定关系
 $\not =$  \not =











 $\gnapprox$  \gnapprox
 $\ngeqslant$  \ngeqslant
 $\nsubseteq$  \nsubseteq
 $\precne$  \precne


 $\gneq$  \gneq
 $\ngtr$  \ngtr
 $\nsubsete$  \nsubsete
 $\precnsim$  \precnsim


 $\gne$  \gne
 $\nleq$  \nleq
 $\nsucc$  \nsucc
 $\subsetneq$  \subsetneq


 $\gnsim$  \gnsim
 $\nle$  \nle
 $\nsucceq$  \nsucceq
 $\subsetne$  \subsetne


 $\gvertne$  \gvertne
 $\nleqslant$  \nleqslant
 $\nsupseteq$  \nsupseteq
 $\succnapprox$  \succnapprox


 $\lnapprox$  \lnapprox
 $\nless$  \nless
 $\nsupsete$  \nsupsete
 $\succne$  \succne


 $\lneq$  \lneq
 $\nmid$  \nmid
 $\ntriangleleft$  \ntriangleleft
 $\succnsim$  \succnsim


 $\lne$  \lne
 $\notin$  \notin
 $\ntrianglelefteq$  \ntrianglelefteq
 $\supsetneq$  \supsetneq


 $\lnsim$  \lnsim
 $\notni$  \notni
 $\ntriangleright$  \ntriangleright
 $\supsetne$  \supsetne


 $\lvertne$  \lvertne
 $\nparallel$  \nparallel
 $\ntrianglerighteq$  \ntrianglerighteq
 $\varsubsetneq$  \varsubsetneq


 $\ncong$  \ncong
 $\nprec$  \nprec
 $\nvdash$  \nvdash
 $\varsubsetne$  \varsubsetne


 $\ne$  \ne
 $\npreceq$  \npreceq
 $\nvDash$  \nvDash
 $\varsupsetneq$  \varsupsetneq


 $\neq$  \neq
 $\nshortmid$  \nshortmid
 $\nVDash$  \nVDash
 $\varsupsetne$  \varsupsetne


 $\ngeq$  \ngeq
 $\nshortparallel$  \nshortparallel
 $\nVdash$  \nVdash



 $\nge$  \nge
 $\nsim$  \nsim
 $\precnapprox$  \precnapprox




Direct Input:  $\in / \neq ∋ ∤ ∦ ≁ ≆ \neq = ≨ ≩ ≮ ≯ ≰ ≱ ⊀ ⊁ ⊈ ⊉ ⊊ ⊋ ⊬ ⊭ ⊮ ⊯ ⋠ ⋡ ⋦ ⋧ ⋨ ⋩ ⋬ ⋭ ⪇ ⪈ ⪉ ⪊ ⪵ ⪶ ⪹ ⪺ ⫋ ⫌$ 
 上述符号可以直接输入

Arrows 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




Direct Input:  $\leftarrow ↑ \to ↓ \leftrightarrow ↕ ↖ ↗ ↘ ↙ ↚ ↛ ↞ ↠ ↢ ↣ \mapsto ↩ ↪ ↫ ↬ ↭ ↮ ↰ ↱ ↶ ↷ ↺ ↻ ↼ ↽ ↾ ↾ ↿ ⇀ ⇁ ⇂ ⇃ ⇄ ⇆ ⇇ ⇈ ⇉ ⇊ ⇋ ⇌ ⇍ ⇎ ⇏ \Leftarrow ⇑ \Rightarrow ⇓ \Leftrightarrow ⇕ ⇚ ⇛ ⇝ ⇠ ⇢ ⟵ ⟶ ⟷ ⟸ ⟹ ⟺ ⟼$  ↽
 上述符号可以直接输入

Extensible Arrows
 扩展箭头










 $\xleftarrow{abc}$  \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}




Style, Color, Size, and Font 样式、颜色、大小和字体
Class Assignment
\mathbin \mathclose \mathinner \mathop
 \mathopen \mathord \mathpunct \mathrel


Color
 颜色

 $\color{blue} F=ma$  \color{blue} F=ma
Note that KaTeX \color acts like a switch. This aligns with LaTeX and differs from MathJax.
 Other KaTeX color functions expect the content to be a function argument:
 注意，KaTeX的\color就像一个开关。这与LaTeX一致，与MathJax不同。
 其他KaTeX颜色函数是将文字作为参数使用的:



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






Font
 字体











 $\mathrm{Ab0}$  \mathrm{Ab0}
 $\mathbf{Ab0}$  \mathbf{Ab0}
 $\mathit{Ab0}$  \mathit{Ab0}


 $\mathnormal{Ab0}$  \mathnormal{Ab0}
 $\textbf{Ab0}$  \textbf{Ab0}
 $\textit{Ab0}$  \textit{Ab0}


 $\textrm{Ab0}$  \textrm{Ab0}
 $\bf Ab0$  \bf Ab0
 $\it Ab0$  \it Ab0


 $\rm Ab0$  \rm Ab0
 $\bold{Ab0}$  \bold{Ab0}
 $\textup{Ab0}$  \textup{Ab0}


 $\textnormal{Ab0}$  \textnormal{Ab0}
 $\boldsymbol{Ab0}$  \boldsymbol{Ab}
 $\Bbb{AB}$  \Bbb{AB}


 $\text{Ab0}$  \text{Ab0}
 $\bm{Ab0}$  \bm{Ab0}
 $\mathbb{AB}$  \mathbb{AB}


 $\mathsf{Ab0}$  \mathsf{Ab0}
 $\textmd{Ab0}$  \textmd{Ab0}
 $\frak{Ab0}$  \frak{Ab0}


 $\textsf{Ab0}$  \textsf{Ab0}
 $\mathtt{Ab0}$  \mathtt{Ab0}
 $\mathfrak{Ab0}$  \mathfrak{Ab0}


 $\sf Ab0$  \sf Ab0
 $\texttt{Ab0}$  \texttt{Ab0}
 $\mathcal{AB0}$  \mathcal{AB0}



 $\tt Ab0$  \tt Ab0
 $\mathscr{AB}$  \mathscr{AB}



One can stack font family, font weight, and font shape by using the \textXX versions of the font functions. So \textsf{\textbf{H}} will produce  $\textsf{\textbf{H}}$ . The other versions do not stack, e.g., \mathsf{\mathbf{H}} will produce  $\mathsf{\mathbf{H}}$ .
 可以使用\textXX版本的字体函数来堆叠字体种类、权重和形状。所以 \textsf{\textbf{H}}将会产生 $\textsf{\textbf{H}}$ 。其他版本不堆叠，例如， \mathsf{\mathbf{H}}}将产生 $\mathsf{\mathbf{H}}$ 。

In cases where KaTeX fonts do not have a bold glyph, \pmb can simulate one. For example, \pmb{\mu} renders as :  $\pmb{\mu}$ 
 在KaTeX字体没有粗体字形的情况下，\pmb可以模拟一个。例如，\pmb{\mu}呈现为： $\pmb{\mu}$ 

Size
 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



Style
 风格









 $\displaystyle\sum_{i=1}^n$  \displaystyle\sum_{i=1}^n


 $\textstyle\sum_{i=1}^n$  \textstyle\sum_{i=1}^n


 $\scriptstyle x$  \scriptstyle x         (The size of a first sub/superscript)


 $\scriptscriptstyle x$  \scriptscriptstyle x (The size of subsequent sub/superscripts)


 $\lim\limits_x$  \lim\limits_x


 $\lim\nolimits_x$  \lim\nolimits_x


 $x^2 \verb!x^2!$  \verb!x^2!



\text{…} will accept nested $…$ fragments and render them in math mode.
 \text{…}将接受嵌套的$…$片段，并以数学模式呈现它们。

Symbols and Punctuation 符号和标点符号










% 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


 $‘$  `
 $\text{\textellipsis}$  \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}
 $\star$  \star
 $\diagup$  \diagup


 $\text{\S}$  \text{\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




Direct Input:  $£ ¥ \nabla \infty \cdot ∠ ∡ ∢ ♠ ♡ ♢ ♣ ♭ ♮ ♯ ✓ \dots ⋮ \dots ⋱!$  ‼
 上述符号可以直接输入

Units单位




KaTeX Unit
Value
KaTeX Unit
Value




em
CSS em
bp
1/72 inch × F × G


ex
CSS ex
pc
12 KaTeX pt


mu
1/18 CSS em
dd
1238/1157 KaTeX pt


pt
1/72.27 inch × 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 inch × F × G
sp
1/65536 KaTeX pt



where:

   
F = (font size of surrounding HTML text)/(10 pt)
G = 1.21 by default, because KaTeX font-size is normally 1.21 × the surrounding font size. This value can be overridden by the CSS of an HTML page.




Unit
textstyle
scriptscript
huge




em or ex
 $\rule{1em}{1em}$ 
 $\scriptscriptstyle\rule{1em}{1em}$ 
 $\huge\rule{1em}{1em}$ 


mu
 $\rule{18mu}{18mu}$ 
 $\scriptscriptstyle\rule{18mu}{18mu}$ 
 $\huge\rule{18mu}{18mu}$ 


others
 $\rule{10pt}{10pt}$ 
 $\scriptscriptstyle\rule{10pt}{10pt}$ 
 $\huge\rule{10pt}{10pt}$


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

Function	Produces	Function	Produces
`\,`	³∕₁₈ em space	`\kern{distance}`	space, width = distance
`\thinspace`	³∕₁₈ em space	`\mkern{distance}`	space, width = distance
`\>`	⁴∕₁₈ em space	`\mskip{distance}`	space, width = distance
`\:`	⁴∕₁₈ em space	`\hskip{distance}`	space, width = distance
`\medspace`	⁴∕₁₈ em space	`\hspace{distance}`	space, width = distance
`\;`	⁵∕₁₈ em space	`\hspace*{distance}`	space, width = distance
`\thickspace`	⁵∕₁₈ em space	`\phantom{content}`	space the width and height of content
`\enspace`	½ em space	`\hphantom{content}`	space the width of content
`\quad`	1 em space	`\vphantom{content}`	a strut the height of content
`\uad`	2 em space	`\!`	– ³∕₁₈ em space
`~`	non-breaking space	`\negthinspace`	– ³∕₁₈ em space
`\`	space	`\negmedspace`	– ⁴∕₁₈ em space
`\nobreakspace`	non-breaking space	`\negthickspace`	– ⁵∕₁₈ em space
`\space`	space


$\forall$ `\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` or `\lnot`


$\def\foo{x^2} \foo + \foo$	`\def\foo{x^2} \foo + \foo`
$\gdef\bar#1{#1^2} \bar{y} + \bar{y}$	`\gdef\bar#1{#1^2} \bar{y} + \bar{y}`
	`\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`


$+$ `+`	$\cdot$ `\cdot`	$\gtrdot$ `\gtrdot`	$\pmod a$ `x \pmod a`
$-$ `-`	$\cdotp$ `\cdotp`	$\intercal$ `\intercal`	$\pod a$ `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`	$\mod a$ `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` or `\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}`
$\over b}$ `{a \over b}`	$\dfrac{a}{b}$ `\dfrac{a}{b}`	$\above{2pt} b+1}$ `{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}`
$\choose k}$ `{n \choose k}`	$\tbinom{n}{k}$ `\tbinom{n}{k}`	${n\brack k}$ `{n\brack k}`


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


$=$ `=`	$\eqcirc$ `\eqcirc`	$\lesseqgtr$ `\lesseqgtr`	$\sqsupset$ `\sqsupset`
$<$ `<`	$\eqcolon$ `\eqcolon`	$\lessegtr$ `\lessegtr`	$\sqsupseteq$ `\sqsupseteq`
$>$ `>`	$\Eqcolon$ `\Eqcolon`	$\lessgtr$ `\lessgtr`	$\Subset$ `\Subset`
$:$ `:`	$\ecolon$ `\ecolon`	$\lesssim$ `\lesssim`	$\subset$ `\subset` or `\sub`
$\approx$ `\approx`	$\Ecolon$ `\Ecolon`	$\ll$ `\ll`	$\subseteq$ `\subseteq` or `\sube`
$\approxeq$ `\approxeq`	$\eqsim$ `\eqsim`	$\lll$ `\lll`	$\subsete$ `\subsete`
$\asymp$ `\asymp`	$\eqslantgtr$ `\eqslantgtr`	$\llless$ `\llless`	$\succ$ `\succ`
$\backepsilon$ `\backepsilon`	$\eqslantless$ `\eqslantless`	$\lt$ `\lt`	$\succapprox$ `\succapprox`
$\backsim$ `\backsim`	$\equiv$ `\equiv`	$\mid$ `\mid`	$\succcurlyeq$ `\succcurlyeq`
$\backsimeq$ `\backsimeq`	$\fallingdotseq$ `\fallingdotseq`	$\models$ `\models`	$\succeq$ `\succeq`
$\between$ `\between`	$\frown$ `\frown`	$\multimap$ `\multimap`	$\succsim$ `\succsim`
$\bowtie$ `\bowtie`	$\ge$ `\ge`	$\owns$ `\owns`	$\Supset$ `\Supset`
$\bumpeq$ `\bumpeq`	$\geq$ `\geq`	$\parallel$ `\parallel`	$\supset$ `\supset`
$\Bumpeq$ `\Bumpeq`	$\ge$ `\ge`	$\perp$ `\perp`	$\supseteq$ `\supseteq` or `\supe`
$\circeq$ `\circeq`	$\geqslant$ `\geqslant`	$\pitchfork$ `\pitchfork`	$\supsete$ `\supsete`
$\colonapprox$ `\colonapprox`	$\gg$ `\gg`	$\prec$ `\prec`	$\thickapprox$ `\thickapprox`
$\Colonapprox$ `\Colonapprox`	$\ggg$ `\ggg`	$\precapprox$ `\precapprox`	$\thicksim$ `\thicksim`
$\coloneq$ `\coloneq`	$\gggtr$ `\gggtr`	$\preccurlyeq$ `\preccurlyeq`	$\trianglelefteq$ `\trianglelefteq`
$\Coloneq$ `\Coloneq`	$\gt$ `\gt`	$\preceq$ `\preceq`	$\triangleq$ `\triangleq`
$\colone$ `\colone`	$\gtrapprox$ `\gtrapprox`	$\precsim$ `\precsim`	$\trianglerighteq$ `\trianglerighteq`
$\Colone$ `\Colone`	$\gtreqless$ `\gtreqless`	$\propto$ `\propto`	$\varpropto$ `\varpropto`
$\colonsim$ `\colonsim`	$\gtreless$ `\gtreless`	$\risingdotseq$ `\risingdotseq`	$\vartriangle$ `\vartriangle`
$\Colonsim$ `\Colonsim`	$\gtrless$ `\gtrless`	$\shortmid$ `\shortmid`	$\vartriangleleft$ `\vartriangleleft`
$\cong$ `\cong`	$\gtrsim$ `\gtrsim`	$\shortparallel$ `\shortparallel`	$\vartriangleright$ `\vartriangleright`
$\curlyeqprec$ `\curlyeqprec`	$\in$ `\in` or `\isin`	$\sim$ `\sim`	$\vcentcolon$ `\vcentcolon`
$\curlyeqsucc$ `\curlyeqsucc`	$\Join$ `\Join`	$\simeq$ `\simeq`	$\vdash$ `\vdash`
$\dashv$ `\dashv`	$\le$ `\le`	$\smallfrown$ `\smallfrown`	$\vDash$ `\vDash`
$\dblcolon$ `\dblcolon`	$\leq$ `\leq`	$\smallsmile$ `\smallsmile`	$\Vdash$ `\Vdash`
$\doteq$ `\doteq`	$\le$ `\le`	$\smile$ `\smile`	$\Vvdash$ `\Vvdash`
$\Doteq$ `\Doteq`	$\leqslant$ `\leqslant`	$\sqsubset$ `\sqsubset`
$\doteqdot$ `\doteqdot`	$\lessapprox$ `\lessapprox`	$\sqsubseteq$ `\sqsubseteq`


$\gnapprox$ `\gnapprox`	$\ngeqslant$ `\ngeqslant`	$\nsubseteq$ `\nsubseteq`	$\precne$ `\precne`
$\gneq$ `\gneq`	$\ngtr$ `\ngtr`	$\nsubsete$ `\nsubsete`	$\precnsim$ `\precnsim`
$\gne$ `\gne`	$\nleq$ `\nleq`	$\nsucc$ `\nsucc`	$\subsetneq$ `\subsetneq`
$\gnsim$ `\gnsim`	$\nle$ `\nle`	$\nsucceq$ `\nsucceq`	$\subsetne$ `\subsetne`
$\gvertne$ `\gvertne`	$\nleqslant$ `\nleqslant`	$\nsupseteq$ `\nsupseteq`	$\succnapprox$ `\succnapprox`
$\lnapprox$ `\lnapprox`	$\nless$ `\nless`	$\nsupsete$ `\nsupsete`	$\succne$ `\succne`
$\lneq$ `\lneq`	$\nmid$ `\nmid`	$\ntriangleleft$ `\ntriangleleft`	$\succnsim$ `\succnsim`
$\lne$ `\lne`	$\notin$ `\notin`	$\ntrianglelefteq$ `\ntrianglelefteq`	$\supsetneq$ `\supsetneq`
$\lnsim$ `\lnsim`	$\notni$ `\notni`	$\ntriangleright$ `\ntriangleright`	$\supsetne$ `\supsetne`
$\lvertne$ `\lvertne`	$\nparallel$ `\nparallel`	$\ntrianglerighteq$ `\ntrianglerighteq`	$\varsubsetneq$ `\varsubsetneq`
$\ncong$ `\ncong`	$\nprec$ `\nprec`	$\nvdash$ `\nvdash`	$\varsubsetne$ `\varsubsetne`
$\ne$ `\ne`	$\npreceq$ `\npreceq`	$\nvDash$ `\nvDash`	$\varsupsetneq$ `\varsupsetneq`
$\neq$ `\neq`	$\nshortmid$ `\nshortmid`	$\nVDash$ `\nVDash`	$\varsupsetne$ `\varsupsetne`
$\ngeq$ `\ngeq`	$\nshortparallel$ `\nshortparallel`	$\nVdash$ `\nVdash`
$\nge$ `\nge`	$\nsim$ `\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`


$\xleftarrow{abc}$ `\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}`	$\mathit{Ab0}$ `\mathit{Ab0}`
$\mathnormal{Ab0}$ `\mathnormal{Ab0}`	$\textbf{Ab0}$ `\textbf{Ab0}`	$\textit{Ab0}$ `\textit{Ab0}`
$\textrm{Ab0}$ `\textrm{Ab0}`	$\bf Ab0$ `\bf Ab0`	$\it Ab0$ `\it Ab0`
$\rm Ab0$ `\rm Ab0`	$\bold{Ab0}$ `\bold{Ab0}`	$\textup{Ab0}$ `\textup{Ab0}`
$\textnormal{Ab0}$ `\textnormal{Ab0}`	$\boldsymbol{Ab0}$ `\boldsymbol{Ab}`	$\Bbb{AB}$ `\Bbb{AB}`
$\text{Ab0}$ `\text{Ab0}`	$\bm{Ab0}$ `\bm{Ab0}`	$\mathbb{AB}$ `\mathbb{AB}`
$\mathsf{Ab0}$ `\mathsf{Ab0}`	$\textmd{Ab0}$ `\textmd{Ab0}`	$\frak{Ab0}$ `\frak{Ab0}`
$\textsf{Ab0}$ `\textsf{Ab0}`	$\mathtt{Ab0}$ `\mathtt{Ab0}`	$\mathfrak{Ab0}$ `\mathfrak{Ab0}`
$\sf Ab0$ `\sf Ab0`	$\texttt{Ab0}$ `\texttt{Ab0}`	$\mathcal{AB0}$ `\mathcal{AB0}`
	$\tt Ab0$ `\tt 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`


$\displaystyle\sum_{i=1}^n$ `\displaystyle\sum_{i=1}^n`
$\textstyle\sum_{i=1}^n$ `\textstyle\sum_{i=1}^n`
$\scriptstyle x$ `\scriptstyle x` (The size of a first sub/superscript)
$\scriptscriptstyle x$ `\scriptscriptstyle x` (The size of subsequent sub/superscripts)
$\lim\limits_x$ `\lim\limits_x`
$\lim\nolimits_x$ `\lim\nolimits_x`
$x^2 \verb!x^2!$ `\verb!x^2!`


`% 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`
$‘$ `	$\text{\textellipsis}$ `\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}`	$\star$ `\star`	$\diagup$ `\diagup`
$\text{\S}$ `\text{\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`

KaTeX Unit	Value	KaTeX Unit	Value
em	CSS em	bp	1/72 inch × F × G
ex	CSS ex	pc	12 KaTeX pt
mu	1/18 CSS em	dd	1238/1157 KaTeX pt
pt	1/72.27 inch × 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 inch × F × G	sp	1/65536 KaTeX pt

Unit	textstyle	scriptscript	huge
em or ex	$\rule{1em}{1em}$	$\scriptscriptstyle\rule{1em}{1em}$	$\huge\rule{1em}{1em}$
mu	$\rule{18mu}{18mu}$	$\scriptscriptstyle\rule{18mu}{18mu}$	$\huge\rule{18mu}{18mu}$
others	$\rule{10pt}{10pt}$	$\scriptscriptstyle\rule{10pt}{10pt}$	$\huge\rule{10pt}{10pt}$

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KaTeX数学公式语法

Supported Functions 支持功能

Accents 强调

Delimiters 分隔符

Environments 环境

HTML

Letters and Unicode 字母和Unicode

Layout 布局

Annotation 注释

Line Breaks 换行符

Vertical Layout 垂直布局

Overlap and Spacing 重叠和间距

Logic and Set Theory 逻辑与集合论

Macros 宏

Operators 运算符

Big Operators 大运算符

Binary Operators 二元运算符

Fractions and Binomials 分数和二项式

Math Operators 数学运算符

\sqrt 平方根

Relations 关系符

Negated Relations 否定关系

Arrows 箭头

Style, Color, Size, and Font 样式、颜色、大小和字体

Symbols and Punctuation 符号和标点符号

Units单位

关于作者

全栈程序员-站长

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KaTeX数学公式语法

Supported Functions 支持功能

Accents 强调

Delimiters 分隔符

Environments 环境

HTML

Letters and Unicode 字母和Unicode

Layout 布局

Annotation 注释

Line Breaks 换行符

Vertical Layout 垂直布局

Overlap and Spacing 重叠和间距

Logic and Set Theory 逻辑与集合论

Macros 宏

Operators 运算符

Big Operators 大运算符

Binary Operators 二元运算符

Fractions and Binomials 分数和二项式

Math Operators 数学运算符

\sqrt 平方根

Relations 关系符

Negated Relations 否定关系

Arrows 箭头

Style, Color, Size, and Font 样式、颜色、大小和字体

Symbols and Punctuation 符号和标点符号

Units单位

关于作者

全栈程序员-站长

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