KaTeX数学公式总结

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}

分隔符

$⌈⌉$ ⌈ ⌉	$\lceil$ \lceil	$\rceil$ \rceil
$\uparrow$ \uparrow	$[ ]$ [ ]	$\lbrack$ \lbrack
$\rbrack$ \rbrack	$⌊ ⌋$ ⌊ ⌋	$\lfloor$ \lfloor
$\rfloor$ \rfloor	$\downarrow$ \downarrow	$\{\}$ \{\}
$\lbrace$ \lbrace	$\rbrace$ \rbrace	$⎰⎱$ ⎰⎱
$\lmoustache$ \lmoustache	$\rmoustache$ \rmoustache	$\updownarrow$ \updownarrow
$⟨ ⟩$ ⟨ ⟩	$\langle$ \langle	$\rangle$ \rangle
$⟮ ⟯$ ⟮ ⟯	$\lgroup$ \lgroup	$\rgroup$ \rgroup
$\Uparrow$ \Uparrow	$	$ |
$┌ ┐$ ┌ ┐	$\ulcorner$ \ulcorner	$\urcorner$ \urcorner
$\Downarrow$ \Downarrow	$\|$ \|	$\Vert$ \Vert
$└ ┘$ └ ┘	$\llcorner$ \llcorner	$\lrcorner$ \lrcorner
$\Updownarrow$ \Updownarrow	$\lvert$ \lvert	$\rvert$ \rvert
$\lVert$ \lVert	$\rVert$ \rVert	$\backslash$ \backslash
$\lang$ \lang	$\rang$ \rang	$\lt \gt$ \lt \gt

大括号

$\begin{matrix}a & b \\ c & d \end{matrix}$	\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}
$\begin{pmatrix} a & b \\ c & b \end{pmatrix}$	\begin{pmatrix} a & b \\ c & b \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}	$x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$	x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}

字母

希腊字母

$\Alpha$ \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	$\chi$ \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}

布局

注解

$\cancel{5}$ \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}
$\tag*{hi} x+y^{2x}$

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{!}{=}

重叠和间隙

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

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

逻辑和集合

$\forall$ \forall	$\complement$ \complement	$\therefore$ \therefore
$\emptyset$ \emptyset	$\exists$ \exists	$\subset$ \subset
$\because$ \because	$\empty$ \empty	$\exist$ \exist
$\subset$ \subset	$\mapsto$ \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

运算符

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

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 or \plusmn	$\wr$ \wr

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}
${a \over b}$ {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
$\operatorname{f}$ \operatorname{f}

跟号

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

关系

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

$=$ =	$\eqcirc$ \eqcirc	$\lesseqgtr$ \lesseqgtr	$\sqsupset$ \sqsupset
$<$ <	$\eqcolon$ \eqcolon	$\lesseqqgtr$ \lesseqqgtr	$\sqsupseteq$ \sqsupseteq
$>$ >	$\Eqcolon$ \Eqcolon	$\lessgtr$ \lessgtr	$\Subset$ \Subset
$:$ :	$\eqqcolon$ \eqqcolon	$\lesssim$ \lesssim	$\subset$ \subset or sub
$\approx$ \approx	$\Eqqcolon$ \Eqqcolon	$\ll$ \ll	$\subseteq$ \subseteq or sube
$\approxeq$ \approxeq	$\eqsim$ \eqsim	$\lll$ \lll	$\subseteqq$ \subseteqq
$\asymp$ \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	$\geqq$ \geqq	$\perp$ \perp	$\supseteq$ \supseteq or \supe
$\circeq$ \circeq	$\geqslant$ \geqslant	$\pitchfork$ \pitchfork	$\supseteqq$ \supseteqq
$\colonapprox$ \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
$\coloneqq$ \coloneqq	$\gtrapprox$ \gtrapprox	$\precsim$ \precsim	$\trianglerighteq$ \trianglerighteq
$\Coloneqq$ \Coloneqq	$\gtreqless$ \gtreqless	$\propto$ \propto	$\varpropto$ \varpropto
$\colonsim$ \colonsim	$\gtreqqless$ \gtreqqless	$\risingdotseq$ \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	$\leqq$ \leqq	$\smile$ \smile	$\Vvdash$ \Vvdash
$\Doteq$ \Doteq	$\leqslant$ \leqslant	$\sqsubset$ \sqsubset
$\doteqdot$ \doteqdot	$\lessapprox$ \lessapprox	$\sqsubseteq$ \sqsubseteq

否定关系

$\not =$ \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

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

拓展箭头

$\xleftarrow{abc}$ \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}

风格，颜色，大小和字体

颜色

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

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{Ab0}	$\Bbb{AB}$ \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}	$\mathfrak{Ab}$ \mathfrak{Ab}
$\sf Ab0$ \sf Ab0	$\texttt{Ab0}$ \texttt{Ab0}	$\mathcal{AB0}$ \mathcal{AB0}
	$\tt Ab0$ \tt Ab0	$\mathscr{AB}$ \mathscr{AB}

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

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
$\scriptscriptstyle x$ \scriptscriptstyle x
$\lim\limits_x$ \lim\limits_x
$\lim\nolimits_x$ \lim\nolimits_x
$\verb!x^2!$ \verb!x^2!

符号和标点

$$ % 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
$`$ `	$\text{\textellipsis}$ \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