Markdown公式（二）

参考资料https://gavin_nicholas.coding.me/archives/

1. 如何输入括号和分隔符

() 、 [] 和 | 表示自己， {} 表示 {} 。当要显示大号的括号或分隔符时，要用 \left 和 \right 命令。

例子：$$f(x,y,z) = 3y^2z \left( 3+\frac{7x+5}{1+y^2} \right)$$ ,显示：
\[f(x,y,z) = 3y^2z \left( 3+\frac{7x+5}{1+y^2} \right)\]

有时候要用\left.或\right.进行匹配而不显示本身。

例子：$$\left. \frac{ {\rm d}u}{ {\rm d}x} \right| _{x=0}$$,显示：
\[\left. \frac{ {\rm d}u}{ {\rm d}x} \right| _{x=0}\]

2. 运算符：

关系运算符markdown语言集合运算符markdown语言对数运算符markdown语言戴帽符号markdown语言\(\pm\)$\pm$\(\emptyset\)$\emptyset$\(\log\)$\log$\(\hat{y}\)$\hat{y}$\(\times\)$\times$\(\in\)$\in$\(\lg\)$\lg$\(\check{y}\)$\check{y}$\(\div\)$\div$\(\notin\)$\notin$\(\ln\)$\ln$\(\breve{y}\)$\breve{y}$\(\mid\)$\mid$\(\subset\)$\subset$\(\nmid\)$\nmid$\(\supset\)$\supset$\(\cdot\)$\cdot$\(\subseteq\)$\subseteq$\(\circ\)$\circ$\(\supseteq\)$\supseteq$\(\ast\)$\ast$\(\bigcap\)$\bigcap$\(\bigodot\)$\bigodot$\(\bigcup\)$\bigcup$\(\bigotimes\)$\bigotimes$\(\bigvee\)$\bigvee$\(\bigoplus\)$\bigoplus$\(\bigvee\)$\bigvee$\(\leq\)$\leq$\(\bigwedge\)$\bigwedge$\(\geq\)$\geq$\(\biguplus\)$\biguplus$\(\neq\)$\neq$\(\bigsqcup\)$\bigsqcup$\(\approx\)$\approx$\(\equiv\)$\equiv$\(\sum\)$\sum$\(\prod\)$\prod$\(\coprod\)$\coprod$

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