LaTeX數學符號

顯示

• 行內顯示 $…$.
  獨行顯示 $$…$$.

• 空格
  a b => $ab$
  a\ b => $ab$
  a \quad b => $ab$
  a \qquad b =>$ab$

括號

• [] => $[]$
  () => $()$
  {} => $\{\}$

• 自適應大小括號 \left( 與\right) :
  (\frac{\sqrt x}{y^3}) => $(\frac{\sqrt{x}}{y^3})$
  \left(\frac{\sqrt x}{y^3}\right) => $\left(\frac{\sqrt{x}}{y^3}\right)$

上標^ 與 下標_

• \bar a=> $\bar{a}$
  \overline {ab}=> $\overline{ab}$

• \hat a => $\hat{a}$
  \widehat {abc} => $abc$

• "x_i^2 =>$x_i^2$
  log_2 A => $lo{g}_{2}A$

• 必要時分組{}
  10^{12} => $10^{12}$
  10^12 => $10^{1}2$
  10_12 => $10_{1}2$
  10_{12} => $10_{12}$
  A_b^c => $A_b^c$
  A_{b^c} => $A_{b^c}$

基本運算符

• A\times B => $A\times B$
  A\div B => $A÷B$
  A\cdot B => $A?B$
  \Rightarrow => $?$

比較運算符

• \forall => $?$
  \exists => $?$
  \exists
• \lt — $<$
  \gt — $>$
  \le — $\le$
  \leq — $\le$
  \leqq — $\leqq$
  \leqslant — $?$
  \ge — $\ge$
  \geq — $\ge$
  \geqq — $\geqq$
  \geqslant — $?$
  \neq — $?=$ 不等號
• \approx —$\approx$
  \sim —$～$
  \simeq—$?$
  \cong —$?$
  \equiv—$\equiv$
  \prec—$?$

常用運算符

• \frac{a}{b} => $\frac{a}{b}$ 復雜分數適用
  \frac ab => $\frac{a}{b}$ 簡單分數適用
  \cfrac{a}{b} => $\frac{a}{b}$ 連續分數適用
• \sqrt{x^3} => $\sqrt{x^3}$
  \sqrt[3]{\frac xy} => $\sqrt[3]{\frac{x}{y}}$
• \sin x => $\sin x$
• \vert a\vert => $|a|$
  \Vert a\Vert => $\Vert a\Vert$
  \langle A \rangle = >$?A?$
  \lceilA\rceil => $?A?$
  \lfloor A\rfloor => $?A?$
  \Biggl(\biggl(\Bigl(\bigl((x)\bigr)\Bigr)\biggr)\Biggr) =>$\left(\right(\left(\right((x)\left)\right)\left)\right)$

集合運算符

• \cup => $\cup$
  \cap => $\cap$
  \setminus => $?$
  \subset => $?$
  \subseteq => $?$
  \subsetneq => $?$
  \supset => $?$
  \in => $\in$
  \notin => $\in /$
  \emptyset => $?$
  \varnothing => $?$

常用高級運算符

• \nabla => $?$
  \partial => $?$
  \sum => $\sum$
  \sum_{i=0}^m i^2 =>${\sum }_{i=0}^m{i}^2$
  \int A => $\int A$
  \iint ? => $?$
  \iiint ? => $?$
  \int_a^b => ${\int }_a^b$
  \prod_{n=1}^{123} => ${\prod }_{n=1}^{123}$
  \bigcup => $?$
  \bigcap => ${?}_{n=1}^{123}$
  \lim_{x\to 0} => ${\lim }_{x\to 0}$
  {n+1 \choose 2k} ? $\left(\genfrac{}{}{0ex}{}{n+1}{2k}\right)$
  \ldots => $a_1,a_2\dots a_n$
  \cdots => $a_1,a_2?a_n$

• 大括號

\left\{ \begin\{array\}{c} a_1x+b_1y+c_1z=d_1 \\ a_2x+b_2y+c_2z=d_2 \\ a_3x+b_3y+c_3z=d_3 \end{array} \right.

$$?\begin{array}{c}{a}_{1}x+b_{1}y+c_{1}z=d_1\\ a_{2}x+b_{2}y+c_{2}z=d_2\\ a_{3}x+b_{3}y+c_{3}z=d_3\end{array}$$

f(n) = \begin{cases} n/2, & \text{if $n$ is even} \\ 3n+1, & \text{if $n$ is odd} \end{cases}

$$f(n)=\{\begin{array}{ll}n/2,& \text{if?n?is?even}\\ 3n+1,& \text{if?n?is?odd}\end{array}$$

常用希臘字符

• \alpha => $\alpha$
  \beta => $\beta$
  \gamma => $\gamma$
  \Gamma => $\Gamma$
  \omega => $\omega$
  Omega => $\Omega$
  \Delta => $\Delta$
  \theta => $\theta$
  \epsilon => $?$
  \varepsilon => $\epsilon$
  \phi => $?$
  \varphi => $\phi$
  \ell => $?$

專用字符

-常規abcABC123
\mathbb {abcABC123} => $abc\mathbb{A}\mathbb{B}\mathbb{C}123$
\mathit {abcABC123} => $abcABC123$
\pmb {abcABC123} => $abcABC123\text{abcABC123}abcABC123$
\mathtt {abcABC123} => $\mathtt{a}\mathtt{b}\mathtt{c}\mathtt{A}\mathtt{B}\mathtt{C}123$
\mathrm {abcABC123} => $\mathrm{a}\mathrm{b}\mathrm{c}\mathrm{A}\mathrm{B}\mathrm{C}123$
\mathsf {abcABC123} => $\mathsf{a}\mathsf{b}\mathsf{c}\mathsf{A}\mathsf{B}\mathsf{C}123$
\mathcal {abcABC123} => $abc\mathcal{A}\mathcal{B}\mathcal{C}123$
\mathscr {abcABC123} => $abc\mathcal{A}\mathcal{B}\mathcal{C}123$
\mathfrak {abcABC123} => $\mathfrak{a}\mathfrak{b}\mathfrak{c}\mathfrak{A}\mathfrak{B}\mathfrak{C}123$

矩陣

\begin{matrix}1 & x & x^2 \\1 & y & y^2 \\1 & z & z^2 \\\end{matrix}

$$\begin{array}{ccc}1& x& x^2\\ 1& y& y^2\\ 1& z& z^2\end{array}$$

\begin{pmatrix}1 & x & x^2 \\1 & y & y^2 \\1 & z & z^2 \\\end{pmatrix}

$$?\begin{array}{ccc}1& x& x^2\\ 1& y& y^2\\ 1& z& z^2\end{array}?$$

\begin{bmatrix}1 & x & x^2 \\1 & y & y^2 \\1 & z & z^2 \\\end{bmatrix}

$$?\begin{array}{ccc}1& x& x^2\\ 1& y& y^2\\ 1& z& z^2\end{array}?$$

\begin{Bmatrix}1 & x & x^2 \\1 & y & y^2 \\1 & z & z^2 \\\end{Bmatrix}

$$?\begin{array}{ccc}1& x& x^2\\ 1& y& y^2\\ 1& z& z^2\end{array}?$$

\begin{vmatrix}1 & x & x^2 \\1 & y & y^2 \\1 & z & z^2 \\\end{vmatrix}

$$\left|\begin{array}{ccc}1& x& x^2\\ 1& y& y^2\\ 1& z& z^2\end{array}\right|$$

以上為常用內容提取自:

lMathJax basic tutorial and quick refer.

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