LaTeX大括号公式和一般括号总结

大括号显示

\begin{equation}  
\left\{  
             \begin{array}{**lr**}  
             x=\dfrac{3\pi}{2}(1+2t)\cos(\dfrac{3\pi}{2}(1+2t)), &  \\  
             y=s, & 0\leq s\leq L,|t|\leq1.\\  
             z=\dfrac{3\pi}{2}(1+2t)\sin(\dfrac{3\pi}{2}(1+2t)), &    
             \end{array}  
\right.  
\end{equation}  

x=3π2(1+2t)cos(3π2(1+2t)),y=s,z=3π2(1+2t)sin(3π2(1+2t)),0sL,|t|1.

对比括号一

\begin{equation}  
\left\{  
\begin{array}{**rcl**}
    IF_{k}(\hat{t}_{k,m})=IF_{m}(\hat{t}_{k,m}), & \\
    IF_{k}(\hat{t}_{k,m}) \pm h= IF_{m}(\hat{t}_{k,m}) \pm h  , &\\
    \left |IF'_{k}(\hat{t}_{k,m} - IF'_{m}(\hat{t}_{k,m} \right |\geq d , &   
\end{array}
\right.  
\end{equation} 

IFk(t^k,m)=IFm(t^k,m),IFk(t^k,m)±h=IFm(t^k,m)±h,IFk(t^k,mIFm(t^k,md,

常用的三种大括号写法

$$ f(x)=\left\{
\begin{aligned}
x & = & \cos(t) \\
y & = & \sin(t) \\
z & = & \frac xy
\end{aligned}
\right.
$$

f(x)=xyz===cos(t)sin(t)xy

$$ F^{HLLC}=\left\{
\begin{array}{rcl}
F_L       &      & {0      <      S_L}\\
F^*_L     &      & {S_L \leq 0 < S_M}\\
F^*_R     &      & {S_M \leq 0 < S_R}\\
F_R       &      & {S_R \leq 0}
\end{array} \right. $$

FHLLC=FLFLFRFR0<SLSL0<SMSM0<SRSR0

$$f(x)=
\begin{cases}
0& \text{x=0}\\
1& \text{x!=0}
\end{cases}$$
\end{CJK*}
\end{document}

f(x)={01x=0x!=0

功能 语法 显示
不好看

\frac{1}{2} 

(12)
好一点

\left( \frac{1}{2} \right)

(12)
您可以使用\left和\right来显示不同的括号:
功能 语法 显示
圆括号,小括号

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

(ab)
方括号,中括号

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

[ab]
花括号,大括号
\left\{ \frac{a}{b} \right\} {ab}
角括号 \left \langle \frac{a}{b} \right \rangle ab
单竖线,绝对值 \left| \frac{a}{b} \right| ab
双竖线,范 \left | \frac{a}{b} \right | ab
取整函数
(Floor function)\left \lfloor \frac{a}{b} \right \rfloor ab
取顶函数
(Ceiling function) \left \lceil \frac{c}{d} \right \rceil cd
斜线与反斜线 \left / \frac{a}{b} \right \backslash /ab\
上下箭头 \left \uparrow \frac{a}{b} \right \downarrow ab
\left \Uparrow \frac{a}{b} \right \Downarrow ab
\left \updownarrow \frac{a}{b} \right \Updownarrow ab
混合括号 \left [ 0,1 \right )\left \langle \psi \right | [0,1)ψ|
单左括号 \left \{ \frac{a}{b} \right . {ab
单右括号 \left . \frac{a}{b} \right \} ab}
备注:
可以使用\big, \Big, \bigg, \Bigg控制括号的大小,比如代码\Bigg ( \bigg [ \Big { \big \langle \left | | \frac{a}{b} | \right | \big \rangle \Big } \bigg ] \Bigg )显示

\Bigg ( \bigg [ \Big \{ \big \langle \left | \| x \| \right | \big \rangle \Big \} \bigg ] \Bigg )

([{|x|}])

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