Markdown 语法
markdown语法
1 公式
1.1 行间
1.1.1 对齐
使用 \begin{align} 与 \end{align} 可实现公式的对齐
\begin{align}
\frac{1}{a} \sum^{n}_{k=1} =1+2+ \cdots + n \\
\prod_\epsilon =3 \\
\int_0 -2-4-\cdots-(2n-2)
= 3\end{align}
\[\begin{align}
\frac{1}{a} \sum^{n}_{k=1} =1+2+ \cdots + n\\
\prod _\epsilon =3\\
\int_0 -2-4-\cdots-(2n-2)
= 3\end{align}
\]
默认右对齐，可以在想对齐的位置加上 & （注意， & 在左在右有区别）
\begin{align}
\frac{1}{a} \sum^{n}_{k=1} &=1+2+ \cdots + n\\
\prod _\epsilon &=3\\
\int_0 -2-\cdots-(2n-2)
&= 3\end{align}
\[\begin{align}
\frac{1}{a} \sum^{n}_{k=1} &=1+2+ \cdots + n\\
\prod _\epsilon &=3\\
\int_0 -2-\cdots-(2n-2)
&= 3\end{align}
\]
将 align 改为 aligned 可以去掉自动的编号
\begin{aligned}
\frac{1}{a} \sum^{n}_{k=1} &=1+2+ \cdots + n\\
\prod _\epsilon &=3\\
\int_0 -2-\cdots-(2n-2)
&= 3\end{aligned}
\[\begin{aligned}
\frac{1}{a} \sum^{n}_{k=1} &=1+2+ \cdots + n\\
\prod _\epsilon &=3\\
\int_0 -2-\cdots-(2n-2)
&= 3\end{aligned}
\]
1.1.2 大括号(只使用2.)
f(x)=\left\{
\begin{aligned}
x & = & \cos(t) \\
y & = & \sin(t) \\
z & = & \frac xy
\end{aligned}
\right.
\[f(x) = \left \{
\begin{aligned}
x & = & \cos(t) \\
y & = & \sin(t) \\
z & = & \frac xy
\end{aligned}
\right.
\]
F^{HLLC}=\left\{
\begin{array}{rcl}
F_Ladasd & & {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.
这里rcl指第一栏右对齐，第二栏中心对齐，第三栏左对齐。参数可以不写，默认中心对齐，但是必须得有大括号
加一个 & 分隔出两栏。
\[F^{HLLC}=\left\{
\begin{array}{rcl}
F_Ladasd & & {0 < S_L}\\
F^*_L & & {S_L \leq 0 < S_M}\\
F^*_R & & {S_M \leq 0 < S_R}\\
F_R & & {S_R \leq 0}
\end{array} \right.
\]
f(x)=
\begin{cases}
0& \text{x=0}\\
1& \text{x!=0}
\end{cases}
\[f(x)=
\begin{cases}
0& \text{x=0}\\
1& \text{x!=0}
\end{cases}
\]
\[f(x)=
\left\{
\begin{array}{l}
0& \textrm{x=0}\\
1& \textrm{x$\ne$0}
\end{array}
\right.
\]
1.1.3 行列式与矩阵的表示
\begin{gathered}
\begin{matrix} 0 & 1 \\ 1 & 0 \end{matrix}
\quad
\begin{pmatrix} 0 & -i \\ i & 0 \end{pmatrix}
\quad
\begin{bmatrix} 0 & -1 \\ 1 & 0 \end{bmatrix}
\quad
\begin{Bmatrix} 1 & 0 \\ 0 & -1 \end{Bmatrix}
\quad
\begin{vmatrix} a & b \\ c & d \end{vmatrix}
\quad
\begin{Vmatrix} i & 0 \\ 0 & -i \end{Vmatrix}
\end{gathered}
\[\begin{gathered}
\begin{matrix} 0 & 1 \\ 1 & 0 \end{matrix}
\quad
\begin{pmatrix} 0 & -i \\ i & 0 \end{pmatrix}
\quad
\begin{bmatrix} 0 & -1 \\ 1 & 0 \end{bmatrix}
\quad
\begin{Bmatrix} 1 & 0 \\ 0 & -1 \end{Bmatrix}
\quad
\begin{vmatrix} a & b \\ c & d \end{vmatrix}
\quad
\begin{Vmatrix} i & 0 \\ 0 & -i \end{Vmatrix}
\end{gathered}
\]
