MathJax
基础教程和快速参考basic tutorial and quick reference

1 查看公式代码

Right-click on the expression ▶ Show Math As ▶ TeX Commands

2 行内公式和公式块

Inline formulas: $\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$ Inline formulas(\dispalystyle): $\displaystyle\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$

\(\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}\)

3 希腊字母 Greek letters

| Char | Code | Char | Code | | :————————————————-: | :———————————————–: | :——————————————-: | :—————————————: | | $\alpha$
$\Alpha$ | \alpha
\Alpha | $\beta$
$\Beta$ | \beta
\Beta | | $\gamma$
$\Gamma$ | \gamma
\Gamma | $\delta$
$\Delta$ | \delta
\Delta | | $\epsilon$,$\varepsilon$
$\Epsilon$ | \epsilon \varepsilon
\Epsilon | $\zeta$
$\Zeta$ | \zeta
\Zeta | | $\eta$
$\Eta$ | \eta
\Eta | $\theta$,$\vartheta$
$\Theta$ | \theta \vartheta
\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 | $\pi$,$\varpi$
$\Pi$ | \pi \varpi
\Pi | | $\rho$,$\varrho$
$\Rho$ | \rho \varrho
\Rho | $\sigma$,$\varsigma$
$\Sigma$ | \sigma \varsigma
\Sigma | | $\tau$
$\Tau$ | \tau
\Tau | $\upsilon$
$\Upsilon$ | \upsilon
\Upsilon | | $\phi$,$\varphi$
$\Phi$ | \phi \varphi
\Phi | $\chi$
$\Chi$ | \chi
\Chi | | $\psi$
$\Psi$ | \psi
\Psi | $\omega$
$\Omega$ | \omega
\Omega |

4 上下角标

| Code | Formula | | ———- | :——–: | | x_i^2 | $x_i^2$ | | \log_2 x | $\log_2 x$ |

5 分组 {Groups}

| Code | Formula | | ——— | :——————: | | 10^10 | $10^10$ | | 10^{10} | $10^{10}$ | | x^5^6 | $\color{red}{error}$ | | {x^y}^z | ${x^y}^z$ | | x^{y^z} | $x^{y^z}$ | | x_i^2 | $x_i^2$ | | x_{i^2} | $x_{i^2}$ |

6 括号 Parentheses

| Code | Formula | | —————————— | :——————————–: | | ( )[ ] | $( )[ ]$ | | \{ \} | ${ }$ | | (\frac{\sqrt x}{y^3}) | $(\frac{\sqrt x}{y^3})$ | | \left(...\right) | $\left(\frac{\sqrt x}{y^3}\right)$ | | \left.invisible | $\left.\frac12\right\rbrace$ |

\Biggl(\biggl(\Bigl(\bigl((x)\bigr)\Bigr)\biggr)\Biggr): $\Biggl(\biggl(\Bigl(\bigl((x)\bigr)\Bigr)\biggr)\Biggr)$

\left和\right同样适用于以下各种括号： [] $[x]$, \{\} ${x}$, || $|x|$, \vert\vert $\vert x\vert$,\Vert\Vert $\Vert x\Vert$,\langle\rangle $\langle x\rangle$, \lceil\rceil $\lceil x\rceil$, \lfloor\rfloor $\lfloor x\rfloor$.

7 求和与积分 Sums and integrals

| Code | Formula | | ———————– | :———————: | | \sum_1^n | $\sum_1^n$ | | \sum_{i=0}^\infty i^2 | $\sum_{i=0}^\infty i^2$ | | \prod | $\prod$ | | \int | $\int$ | | \bigcup | $\bigcup$ | | \bigcap | $\bigcap$ | | \iint | $\iint$ | | \iiint | $\iiint$ | | \idotsint | $\idotsint$ |

8 分式 Fractions

| Code | Formula | | ——————————— | :—————————: | | \frac ab$ | $\frac ab$ | | \frac{a+1}{b+1} | $\frac{a+1}{b+1}$ | | {a+1\over b+1} | ${a+1\over b+1}$ | | \cfrac{a}{b}
适用于嵌套括号 | $\cfrac{1}{1+\cfrac{1}{1+x}}$ |

9 字体 Fonts

| Code | Formula | | ———– | :————————————: | | \mathbb | $\mathbb{\text{blackboard bold}}$ | | \Bbb | $\Bbb{Blackboard bold}$ | | \mathbf | $\mathbf{Boldface}$ | | \mathit | $\mathit{Italics}$ | | \pmb | $\pmb{\text{Boldfaced Italics}}$ | | \mathtt | $\mathtt{Typerwriter}$ | | \mathrm | $\mathrm{Roman Font}$ | | \mathsf | $\mathsf{Sans-serif Font}$ | | mathcal | $\mathcal{Calligraphic Letters}$ | | \mathscr | $\mathscr{Script Letters}$ | | \mathfrak | $\mathfrak{Fraktur(Old German Style)}$ |

10 根号或开方 Radical signs / roots

| Code | Formula | | ——————– | :——————: | | \sqrt | $\sqrt{x^3}$ | | \sqrt[3]{\frac xy} | $\sqrt[3]{\frac xy}$ | | {\frac xy}^{1/2} | ${\frac xy}^{1/2}$ |

11 特殊函数 Special functions

| Code | Formula | | ———————– | :————————–: | | \sin x (NOT sin x) | $\sin x$ (NOT $sin x$) | | \ln x | $\ln x$ | | \lim_{x\to 0} | $\lim_{x\to 0}$ | | \displaystyle | $\displaystyle\lim_{x\to 0}$ | | \operatorname{foo}(x) | $\operatorname{foo}(x)$ |

12 特殊符号与标记 Special symbols and notations

| Code | Formula | | :—————————————————————————————————: | :—————————————————————————————————: | | \lt \gt
\le \ge
\leq \geq
\leqq \geqq
\leqslant \geqslant | $\lt \gt$
$\le \ge$
$\leq \geq$
$\leqq \geqq$
$\leqslant \geqslant$ | | \not= \not\lt | $\not=$ $\not\lt$ | | \times \div \pm \mp \cdot | $\times \div \pm \mp \cdot$ | | \cup \cap \setminus \subset
\subseteq \subsetneq \supset \in
\notin \emptyset \varnothing | $\cup \cap \setminus \subset$
$\subseteq \subsetneq \supset \in$
$\notin \emptyset \varnothing$ | | {n+1 \choose 2k}
OR\binom{n+1}{2k} | ${n+1 \choose 2k}$ | | \to \rightarrow \leftarrow
\Rightarrow \Leftarrow \mapsto | $\to \rightarrow \leftarrow$
$\Rightarrow \Leftarrow \mapsto$ | | \land \lor \lnot \forall
\exists \top \bot \vdash \vDash | $\land \lor \lnot \forall$
$\exists \top \bot \vdash \vDash$ | | \star \ast \oplus \circ \bullet | $\star \ast \oplus \circ \bullet$ | | \approx \sim \simeq \cong
\equiv \prec \lhd \therefore | $\approx \sim \simeq \cong$
$\equiv \prec \lhd \therefore$ | | \infty \aleph_0 \nabla
\partial \Im \Re | $\infty \aleph_0 \nabla$
$\partial \Im \Re$ | | a\equiv b\pmod n | $a\equiv b\pmod n$ | | \ldots
\cdots | $a_1,a_2\ldots a_n$
$a_1+a_2+\cdots a_n$ | | \ell Script lowercase l | $\ell$ |

13 空格 Spaces

| Code | Formula | | ———– | :——————–: | | a b | $a b$ | | a b | $a b$ | | a\,b | $a\,b$ | | a\;b | $a\;b$ | | a\quad b | $a\quad b$ | | a\qquad b | $a\qquad b$ | | \text | $\text{Hello, World!}$ |

14 强调与标记 Accents and diacritical marks

| Code | Formula | | ——————— | :———————–: | | \hat | $\hat x$ | | | | | \widehat | $\widehat{xy}$ | | \bar | $\bar x$ | | \oveline | $\overline{xyz}$ | | \vec | $\vec x$ | | \overrightarrow | $\overrightarrow{xy}$ | | \overleftrightarrow | $\overleftrightarrow{xy}$ | | \dot | $\dot x$ | | \ddot | $\ddot x$ |

15 转义 Escape \

| Code | Formula | | —————————– | :———-: | | \\\$ | $\$$ | | \{ | ${$ | | \_ | $_$ | | \backslash(symbol) | $\backslash$ | | \setminus(binary operation) | $\setminus$ | | \\ | New Line |