大括号显示

{ x = 3 π 2 ( 1 + 2 t ) cos ⁡ ( 3 π 2 ( 1 + 2 t ) ) , y = s , 0 ≤ s ≤ L , ∣ t ∣ ≤ 1. z = 3 π 2 ( 1 + 2 t ) sin ⁡ ( 3 π 2 ( 1 + 2 t ) ) , \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. ⎩⎪⎪⎨⎪⎪⎧​x=23π​(1+2t)cos(23π​(1+2t)),y=s,z=23π​(1+2t)sin(23π​(1+2t)),​0≤s≤L,∣t∣≤1.​ 对比括号一

{ I F k ( t ^ k , m ) = I F m ( t ^ k , m ) , I F k ( t ^ k , m ) ± h = I F m ( t ^ k , m ) ± h , ∣ I F k ′ ( t ^ k , m − I F m ′ ( t ^ k , m ∣ ≥ d , \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. ⎩⎨⎧​IFk​(t^k,m​)=IFm​(t^k,m​),IFk​(t^k,m​)±h=IFm​(t^k,m​)±h,∣∣​IFk′​(t^k,m​−IFm′​(t^k,m​∣∣​≥d,​​ 常用的三种大括号写法

f ( x ) = { x = cos ⁡ ( t ) y = sin ⁡ ( t ) z = x y f(x)=\left\{ \begin{aligned} x & = & \cos(t) \\ y & = & \sin(t) \\ z & = & \frac xy \end{aligned} \right. f(x)=⎩⎪⎪⎨⎪⎪⎧​xyz​===​cos(t)sin(t)yx​​

F H L L C = { F L 0 < S L F L ∗ S L ≤ 0 < S M F R ∗ S M ≤ 0 < S R F R S R ≤ 0 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=⎩⎪⎪⎨⎪⎪⎧​FL​FL∗​FR∗​FR​​​0