common latex

说明	LaTeX	显示	english
不等于	\neq	≠	not equal to
大于等于	\ge	≥	greater than or equal to
小于等于	\le	≤	less than or equal to
约等于	\approx	≈	approximately equal to
相似	\sim	~	similar to
	\pm	$\pm$	plus or minus

\left( \frac{a}{b} \right)
\left[ \frac{a}{b} \right]
\left\{ \frac{a}{b} \right\}

$$\left(\frac{a}{b}\right)\left[\frac{a}{b}\right]\left\{\frac{a}{b}\right\}$$ $$\begin{array}{rl}a& =b+c\\ d& =e-f\end{array}$$ $$\{\begin{array}{l}(x+1)(x-1)(x-2)=0\\ x\ge 0\end{array}$$ $$\begin{array}{l}{\lim }_{x\to \infty }\frac{1}{x}=0\\ x\to +\infty \frac{1}{10}\cdot \frac{1}{100}\cdot \frac{1}{1000}\cdot \frac{1}{10000}\to 0\\ x\to -\infty \frac{1}{-100}\cdot \frac{1}{-1000}\cdot \frac{1}{-10000}\to 0\end{array}$$

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dm自动生成 (display math)

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\begin{array}{列格式} 
内容 
\end{array}

l	left	左对齐
c	center	居中对齐
r	right	右对齐

希腊字母	latex	english
$\psi$	\psi	/saɪ/