Markdown数学符号

上标

语法：

x^2

效果：

\(x^2\)

下标

语法：

x_i

效果：

\(x_i\)

整体

语法：

x^{2y}

效果：

\(x^{2y}\)

大括号

语法：

\{\}

效果：

\(\{\}\)

分数线

语法：

\frac12

\frac{12}{23}

效果：

\(\frac12\)

\(\frac{12}{23}\)

开方

语法：

\sqrt{x}

\sqrt[3]{x}

效果：

\(\sqrt{x}\)

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

省略号

语法：

\ldots \cdots

效果：

\(\ldots \cdots\)

矢量

语法：

\vec{ a }

效果：

\(\vec{ a }\)

积分

语法：

\int_0^2 x^2 {\rm d}x

\(\int_0^2 x^2 {\rm d}x\)

极限

语法：

\lim\limits_{n \rightarrow +\infty} \frac{1}{n(n+1)}

效果：

\(\lim\limits_{n \rightarrow +\infty} \frac{1}{n(n+1)}\)

累加

语法：

\sum_{i=0}^n i^2

\Sigma_{i=0}^n i^2

效果：

\(\sum_{i=0}^n i^2\)

\(\Sigma_{i=0}^n i^2\)

累乘

语法：

\prod_{i=1}^n i^2

\Pi_{i=1}^n i^2

效果：

\(\prod_{i=1}^n i^2\)

\(\Pi_{i=1}^n i^2\)

希腊字母

语法(大写)	效果(大写)	语法(小写)	效果(小写)
\Alpha	\(\Alpha\)	\alpha	\(\alpha\)
\Beta	\(\Beta\)	\beta	\(\beta\)
\Gamma	\(\Gamma\)	\gamma	\(\gamma\)
\Delta	\(\Delta\)	\delta	\(\delta\)
\Epsilon	\(\Epsilon\)	\epsilon	\(\epsilon\)
\Zeta	\(\Zeta\)	\zeta	\(\zeta\)
\Eta	\(\Eta\)	\eta	\(\eta\)
\Theta	\(\Theta\)	\theta	\(\theta\)
\Iota	\(\Iota\)	\iota	\(\iota\)
\Kappa	\(\Kappa\)	\kappa	\(\kappa\)
\Lambda	\(\Lambda\)	\lambda	\(\lambda\)
\Mu	\(\Mu\)	\mu	\(\mu\)
\Nu	\(\Nu\)	\nu	\(\nu\)
\Xi	\(\Xi\)	\xi	\(\xi\)
\Omicron	\(\Omicron\)	\omicron	\(\omicron\)
\Pi	\(\Pi\)	\pi	\(\pi\)
\Rho	\(\Rho\)	\rho	\(\rho\)
\Sigma	\(\Sigma\)	\sigma	\(\sigma\)
\Tau	\(\Tau\)	\tau	\(\tau\)
\Upsilon	\(\Upsilon\)	\upsilon	\(\upsilon\)
\Phi	\(\Phi\)	\phi	\(\phi\)
\Chi	\(Chi\)	\chi	\(\chi\)
\Psi	\(\Psi\)	\psi	\(\psi\)
\Omega	\(\Omega\)	\omega	\(\omega\)

关系运算符

语法	效果
\pm	\(\pm\)
\times	\(\times\)
\div	\(\div\)
\mid	\(\mid\)
\nmid	\(\nmid\)
\cdot	\(\cdot\)
\circ	\(\circ\)
\ast	\(\ast\)
\bigodot	\(\bigodot\)
\bigotimes	\(\bigotimes\)
\bigoplus	\(\bigoplus\)
\le	\(\le\)
\ge	\(\ge\)
\ne	\(\ne\)
\approx	\(\approx\)
\equiv	\(\equiv\)
\sum	\(\sum\)
\prod	\(\prod\)
\coprod	\(\coprod\)

集合运算符

语法	效果
\emptyset	\(\emptyset\)
\in	\(\in\)
\notin	\(\notin\)
\subset	\(\subset\)
\supset	\(\supset\)
\subseteq	\(\subseteq\)
\supseteq	\(\supseteq\)
\bigcap	\(\bigcap\)
\bigcup	\(\bigcup\)
\bigvee	\(\bigvee\)
\bigwedge	\(\bigwedge\)
\biguplus	\(\biguplus\)
\bigsqcup	\(\bigsqcup\)

对数运算符

语法	效果
\log	\(\log\)
\lg	\(\lg\)
\ln	\(\ln\)

三角运算符

语法	效果
\bot	\(\bot\)
\angle	\(\angle\)
30^\circ	\(30^\circ\)
\sin	\(\sin\)
\cos	\(\cos\)
\tan	\(\tan\)
\cot	\(\cot\)
\sec	\(\sec\)
\csc	\(\csc\)

微积分运算符

语法	效果
\prime	\(\prime\)
\int	\(\int\)
\iint	\(\iint\)
\iiint	\(\iiint\)
\iiiint	\(\iiiint\)
\oint	\(\oint\)
\lim	\(\lim\)
\infty	\(\infty\)
\nabla	\(\nabla\)

逻辑运算符

语法	效果
\because	\(\because\)
\therefore	\(\therefore\)
\forall	\(\forall\)
\exists	\(\exists\)
\not=	\(\not=\)
\not>	\(\not>\)
\not\subset	\(\not\subset\)

戴帽符号

语法	效果
\hat{y}	\(\hat{y}\)
\check{y}	\(\check{y}\)
\breve{y}	\(\breve{y}\)

连线符号

语法	效果
\overline{a+b+c+d}	\(\overline{a+b+c+d}\)
\underline{a+b+c+d}	\(\underline{a+b+c+d}\)
\overbrace{a+b+c+d}	\(\overbrace{a+b+c+d}\)
\underbrace{a+b+c+d}	\(\underbrace{a+b+c+d}\)

箭头符号

语法	效果
\uparrow	\(\uparrow\)
\downarrow	\(\downarrow\)
\Uparrow	\(\Uparrow\)
\Downarrow	\(\Downarrow\)
\rightarrow	\(\rightarrow\)
\leftarrow	\(\leftarrow\)
\Rightarrow	\(\Rightarrow\)
\Leftarrow	\(\Leftarrow\)
\longrightarrow	\(\longrightarrow\)
\longleftarrow	\(\longleftarrow\)
\Longrightarrow	\(\Longrightarrow\)
\Longleftarrow	\(\Longleftarrow\)

来源：https://www.cnblogs.com/hovny/p/10424333.html