latex常用符号
博客园公式测试
显示latex格式的公式需要加美元号$，例如$\beta$显示的结果为\(\beta\)，如果单独一行的公式可用双美元符号，例如$$a+b=c$$会单独成行
0.常用公式
| \(x=\frac{-b\mp\sqrt{b^2-4ac}}{2a}\) | x=\frac{-b\mp\sqrt{b^2-4ac}}{2a} |
| \(x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\) | x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a} |
| \(n! = 1\times2\times3\cdots\times n\) | n! = 1\times2\times3\cdots\times n |
| \(\oint f(s)\mathrm{d}s\) | \oint f(s)\mathrm{d}r |
| \(\displaystyle\oint f(s)\mathrm{d}s\) | \displaystyle\oint f(s)\mathrm{d}s |
| \(\displaystyle\int_{-1}^{+\infty} f(x)\mathrm{d}x\) | \displaystyle\int_{-1}^{+\infty} f(x)\mathrm{d}x |
| \(\displaystyle\iint f({\boldsymbol x})\mathrm{d}{\boldsymbol x}\) | \displaystyle\iint f({\boldsymbol x})\mathrm{d}{\boldsymbol x} |
| \(\left\|\sum_{i=1}^{p+1} \right\|\) | \left\|\sum_{i=1}^{p+1}\right\| |
| \(\left\|\displaystyle\sum_{i=1}^{p+1} \right\|\) | \left\|\displaystyle\sum_{i=1}^{p+1} \right\| |
| \(\Big\Vert\displaystyle\sum_{i=1}^{p+1}\bigg\Vert\) | \Big\Vert\displaystyle\sum_{i=1}^{p+1}\bigg\Vert |
| \(\nabla\cdot\nabla u = \Delta u\) | \nabla\cdot\nabla u = \Delta u |
| \({a+b \choose a+b+c}\) | {a+b \choose a+b+c} |
| \(\left({}_{a+b+c}^{a+b}\right)\) | \left({}_{a+b+c}^{a+b}\right) |
| \({a+b \atop a+b+c}\) | {a+b \atop a+b+c} |
| \(C_{a+b+c}^{a+b}\) | C_{a+b+c}^{a+b} |
| \(\min\limits^{x\in\mathcal{R}}f(x)\) | \min\limits^{x\in\mathcal{R}}f(x) |
| \(\max\limits_{x\in\mathcal{R}}f(x)\) | \max\limits_{x\in\mathcal{R}}f(x) |
\(\dfrac{\mathrm{d}u}{\mathrm{d}t}=\dfrac{\partial u}{\partial x}\dfrac{\partial x}{\partial t} + \dfrac{\partial u}{\partial y}\dfrac{\partial y}{\partial t}\)
\dfrac{\mathrm{d}u}{\mathrm{d}t}
=
\dfrac{\partial u}{\partial x}\dfrac{\partial x}{\partial t}
+
\dfrac{\partial u}{\partial y}\dfrac{\partial y}{\partial t}
1.希腊字母
| \(\alpha\) | \alpha | \(\theta\) | \theta | \(o\) | o | \(\tau\) | \tau | |||
| \(\beta\) | \beta | \(\vartheta\) | \vartheta | \(\pi\) | \pi | \(\upsilon\) | \upsilon | |||
| \(\gamma\) | \gamma | \(\iota\) | \iota | \(\varpi\) | \varpi | \(\phi\) | \phi | |||
| \(\delta\) | \delta | \(\kappa\) | \kappa | \(\rho\) | \rho | \(\varphi\) | \varphi | |||
| \(\epsilon\) | \epsilon | \(\lambda\) | \lambda | \(\varrho\) | \varrho | \(\chi\) | \chi | |||
| \(\varepsilon\) | \varepsilon | \(\mu\) | \mu | \(\sigma\) | \sigma | \(\psi\) | \psi | |||
| \(\zeta\) | \zeta | \(\nu\) | \nu | \(\varsigma\) | \varsigma | \(\omega\) | \omega | |||
| \(\eta\) | \eta | \(\zeta\) | \zeta | |||||||
| \(\Gamma\) | \Gamma | \(\Lambda\) | \Lambda | \(\Sigma\) | \Sigma | \(\Psi\) | \Psi | |||
| \(\Delta\) | \Delta | \(\Xi\) | \Xi | \(\Upsilon\) | \Upsilon | \(\Omega\) | \Omega | |||
| \(\Theta\) | \Theta | \(\Pi\) | \Pi | \(\Phi\) | \Phi | |||||
| \(\aleph\) | \aleph | \(\beth\) | \beth | \(\daleth\) | \daleth | \(\gimel\) | \gimel |
2.数学相关
| \(\dfrac{abc}{xyz}\) | \dfrac{abc}{xyz} | \(\frac{abc}{xyz}\) | \frac{abc}{xyz} | \(\overline{abc}\) | \overline{abc} | ||
| \(\sqrt{abc}\) | \sqrt{abc} | \(\sqrt[n]{abc}\) | \sqrt[n]{abc} | \(\underline{abc}\) | \underline{abc} | ||
| \(\widehat{abc}\) | \widehat{abc} | \(\widetilde{abc}\) | \widetilde{abc} | \(\overrightarrow{abc}\) | \overrightarrow{abc} | ||
| \(\overleftarrow{abc}\) | \overleftarrow{abc} | \(\overbrace{abc}\) | \overbrace{abc} | \(\underbrace{abc}\) | \underbrace{abc} | ||
| \(\overset{\frown} {ab}\) | \overset{\frown}{ab} | \(\overgroup{AB}\) | \overparen{ab} |
注：头顶的弧盖\overparen{ab}用于\(\LaTeX\), \overgroup{AB}\(\overgroup{AB}\)用于\(\KaTeX\)
3.分割符号
| \(\vert\) | \vert | \(\langle\) | \langle | \(\lfloor\) | \lfoolr | \(\lceil\) | \lceil | |||
| \(\Vert\) | \Vert | \(\rangle\) | \rangle | \(\rfloor\) | \rfloor | \(\rceil\) | \rceil | |||
| \(\Uparrow\) | \Uparrow | \(\uparrow\) | \uparrow | \(\Downarrow\) | \Downarrow | \(\downarrow\) | \downarrow | |||
| \(\llcorner\) | \llcorner | \(\lrcorner\) | \lrcorner | \(\ulcorner\) | \ulcorner | \(\urcorner\) | \urcorner | |||
| \(/\) | / | \(\backslash\) | \backslash |
4.可变公式
| \(\sum\) | \sum | \(\prod\) | \prod | \(\coprod\) | \coprod | ||
| \(\int\) | \int | \(\oint\) | \ont | \(\iint\) | \iint | ||
| \(\biguplus\) | \biguplus | \(\bigcap\) | \bigcap | \(\bigcup\) | \bigcup | ||
| \(\bigoplus\) | \bigoplus | \(\bigotimes\) | \bigotimes | \(\bigodot\) | \bigodot | ||
| \(\bigvee\) | \bigvee | \(\bigwedge\) | \bigwedge | \(\bigsqcup\) | \bigsqcup |
5.数学函数
只需要在常用数学函数前加上斜杠\即可$\sin, \cos, \tan, \exp, \min, \max, \log, \ln, \lim, \cdots$
\(\sin, \cos, \tan, \exp, \min, \max, \log, \ln, \lim, \cdots\)
6.运算符号
| \(+\) | + | \(-\) | - | \(\times\) | \times | \(\div\) | \div | |||
| \(\ast\) | \ast | \(\star\) | \star | \(\cdot\) | \cdot | \(\circ\) | \circ | |||
| \(\pm\) | \pm | \(\mp\) | \mp | \(\oplus\) | \oplus | \(\otimes\) | \otimes | |||
| \(\divideontimes\) | \divideontimes | \(\centerdot\) | \centerdot | \(\odot\) | \odot | \(\circledcirc\) | \circledcirc | |||
| \(\cap\) | \cap | \(\cup\) | \cup | \(\vee\) | \vee | \(\wedge\) | \wedge | |||
| \(\bot\) | \bot | \(\perp\) | \perp | \(\setminus\) | \setminus | \(\backslash\) | \backslash | |||
| \(\Box\) | \Box | \(\square\) | \square | \(\wr\) | \wr | \(\boxplus\) | \boxplus | |||
| \(\triangle\) | \triangle | \(\bigtriangledown\) | \bigtriangledown | \(\Delta\) | \Delta | \(\nabla\) | \nabla | |||
| \(\equiv\) | \equiv | \(\neq\) | \neq | \(\sim\) | \sim | \(\approx\) | \approx | |||
| \(\triangleq\) | \triangleq | \(\varpropto\) | \varpropto | \(\ll\) | \ll | \(\lll\) | \lll | |||
| \(\leq\) | \leq | \(\geq\) | \geq | \(\leqslant\) | \leqslant | \(\geqslant\) | \geqslant | |||
| \(\in\) | \in | \(\notin\) | \notin | \(\prec\) | \prec | \(\succ\) | \succ | |||
| \(\subset\) | \subset | \(\subseteq\) | \subseteq | \(\supset\) | \supset | \(\supseteq\) | \supseteq | |||
| \(\supseteqq\) | \supseteqq | \(\subseteqq\) | \subseteqq | \(\nsubseteq\) | \nsubseteq | \(\nsubseteqq\) | \nsubseteqq | |||
| \(\subsetneq\) | \subsetneq | \(\subsetneqq\) | \subsetneqq | \(\supsetneq\) | \supsetneq | \(\supsetneqq\) | \supsetneqq | |||
| \(\complement\) | \complement | \(\cong\) | \cong | ≌ | \text{≌} | ∽ | \text{∽} |
相似全等符号\(\text{≅∼≌∽}\)可以直接输入，建议用\text{≅∼≌∽}
也可以组合 \(\begin{matrix} \sim\\[-0.8em]= \end{matrix}\) ，\begin{matrix} \sim\\[-0.8em]= \end{matrix}
7.其它符号
| \(\because\) | \because | \(\therefore\) | \therefore | \(//\) | // |
\(\perp\) | \perp | |||
| \(\triangle\) | \triangle | \(\square\) | \square | \(\text{▱}\) | \text{▱} |
\({}_{=}^{//}\) | {}_{=}^{//} |
|||
| \(\infty\) | \infty | \(\angle\) | \angle | \(\measuredangle\) | \measuredangle | \(\sphericalangle\) | \sphericalangle | |||
| \(\forall\) | \foall | \(\exist\) | \exist | \(\varnothing\) | \varnothing | \(\emptyset\) | \emptyset | |||
| \(\partial\) | \partial | \(\prime\) | \prime | \(\hbar\) | \hbar | \(\surd\) | \surd | |||
| \(\cdots\) | \cdots | \(\vdots\) | \vdots | \(\ldots\) | \ldots | \(\ddots\) | \ddots | |||
| \(\Im\) | \Im | \(\Re\) | \Re | \(\lozenge\) | \lozenge | \(\mho\) | \mho | |||
| \(\spadesuit\) | \spadesuit | \(\heartsuit\) | \heartsuit | \(\clubsuit\) | \clubsuit | \(\diamondsuit\) | \diamondsuit | |||
| \(\copyright\) | \copyright | \(\circledS\) | \circledS | \(\circledR\) | \circledR | \(\pounds\) | \pounds | |||
| $ | \$ |
\(\%\) | \% |
\(\#\) | \# |
~ | \~{} |
|||
| \(\imath\) | \imath | \(\jmath\) | \jmath | \(\ell\) | \ell |
注1：平行四边形符号
▱并不是内置的latex符号而是特殊字符
注2：\(//\)与\({}_{=}^{//}\)是组合生成，并非内置
8.箭头合集
| \(\rightarrow\) | \rightarrow | \(\longrightarrow\) | \longrightarrow | \(\Rightarrow\) | \Rightarrow |
| \(\Longrightarrow\) | \Longrightarrow | \(\leftarrow\) | \leftarrow | \(\longleftarrow\) | \longleftarrow |
| \(\Leftarrow\) | \Leftarrow | \(\Longleftarrow\) | \Longleftarrow | \(\nearrow\) | \nearrow |
| \(\searrow\) | \searrow | \(\swarrow\) | \swarrow | \(\nwarrow\) | \nwarrow |
| \(\mapsto\) | \mapsto | \(\longmapsto\) | \longmapsto | \(\rightsquigarrow\) | \rightsquigarrow |
| \(\rightrightarrows\) | \rightrightarrows | \(\leftrightarrow\) | \leftrightarrow | \(\longleftrightarrow\) | \longleftrightarrow |
| \(\Leftrightarrow\) | \Leftrightarrow | \(\Longleftrightarrow\) | \Longleftrightarrow | \(\rightleftharpoons\) | \rightleftharpoons |
| \(\leftrightarrows\) | \leftrightarrows | \(\leftrightharpoons\) | \leftrightharpoons | \(\rightleftarrows\) | \rightleftarrows |
| \(\circlearrowleft\) | \circlearrowleft | \(\circlearrowright\) | \circlearrowright | \(\nLeftarrow\) | \nLeftarrow |
| \(\nRightarrow\) | \nRightarrow | \(\nLeftrightarrow\) | \nLeftrightarrow | \(\leftrightsquigarrow\) | \leftrightsquigarrow |
| \(\dashrightarrow\) | \dashrightarrow | \(\dashleftarrow\) | \dashleftarrow |
9.帽子标记
| \(\bar{a}\) | \bar{a} | \(\acute{a}\) | \acute{a} | \(\check{a}\) | \check{a} | \(\grave{a}\) | \grave{a} | |||
| \(\dot{a}\) | \dot{a} | \(\hat{a}\) | \hat{a} | \(\breve{a}\) | \breve{a} | \(\vec{a}\) | \vec{a} | |||
| \(\ddot{a}\) | \ddot{a} | \(\tilde{a}\) | \tilde{a} |
10.数学样式
\mathcal{A}
\(\mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathbb{A}
\(\mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathfrak{A}
\(\mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathsf{A}
\(\mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathscr{A}
\(\mathscr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathrm{A}
\(\mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathit{A}
\(\mathit{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathnormal{A}
\(\mathnormal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\mathbf{A}
\(\mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\textbf{A} 文本样式粗体
\(\textbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\text{A} 文本样式
\(\text{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\bm{A}
\(\bm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
\boldsymbol{A}
\(\boldsymbol{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)
11.大小颜色
| \({\color{red}123} {\color{blue}456} {\color{green}789}\) | {\color{red}123} {\color{blue}456} {\color{green}789} |
| \(\tiny{abc}\) | \tiny{abc} |
| \(\scriptsize{abc}\) | \scriptsize{abc} |
| \(\footnotesize{abc}\) | \footnotesize{abc} |
| \(\small{abc}\) | \small{abc} |
| \(\normalsize{abc}\) | \normalsize{abc} |
| \(\large{abc}\) | \large{abc} |
| \(\Large{abc}\) | \Large{abc} |
| \(\LARGE{abc}\) | \LARGE{abc} |
| \(\huge{abc}\) | \huge{abc} |
| \(\Huge{abc}\) | \Huge{abc} |
| \(\left[ \Bigg( \bigg( \Big[ \big( \right.\) | \left[ \Bigg( \bigg( \Big[ \big( \right. |
| \(\left[ \bigg\{ \Big\}\big\} \right]\) | \left[ \bigg\{ \Big\}\big\} \right] |
注：
\left与\right成对出现，缺省可用.补充，它会自动设置大小
13.多行公式
多行公式常用的两环境有cases与aligned
\(\begin{cases} x+y=1\\ x-y=1 \end{cases}, \qquad % %后面是接注释，\qquaa表示空格 \begin{aligned} &\int_{-\infty}^{+\infty}f(x)\mathrm{d}x\\[.8em] &\sum_{k=0}^n k \end{aligned}\)
\begin{cases}
x+y=1\\
x-y=1
\end{cases},
\qquad % %后面是接注释，\qquaa表示空格
\begin{aligned}
&\int_{-\infty}^{+\infty}f(x)\mathrm{d}x\\[.5em]
&\sum_{k=0}^n k
\end{aligned}
% &字符号表示对齐，\\另起一行, \\[.5em]里面的.5表示行高
矩阵格式
\(\left(\begin{matrix} 1&2&3\\ 4&5&6\\ 7&8&9 \end{matrix}\right) ,\qquad \left| \begin{matrix} a&b\\ c&d \end{matrix}\right| ,\qquad \begin{matrix} a&b\\ c&d \\ e&f \end{matrix}\)
\left(\begin{matrix}
1&2&3\\
4&5&6\\
7&8&9
\end{matrix}\right)
,\qquad
\left|
\begin{matrix}
a&b\\
c&d
\end{matrix}\right|
,\qquad
\begin{matrix}
a&b\\
c&d \\
e&f
\end{matrix}
14.间距微调
间距紧凑：\!
| \(x+y\) | x+y |
| \(x\!+y\) | x\!+y |
| \(x\!\!+y\) | x\!\!+y |
间距拉开：\, \; \quad \qquad
| \(x+y\) | x+y |
| \(x+\,y\) | x+\,y |
| \(x+\;y\) | x+\;y |
| \(x+\quad y\) | x+\quad y |
| \(x+\qquad y\) | x+\qquad y |
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本文来源 https://kz16.top/latex/symbol
本文参考https://katex.org/docs/supported.html