LaTeX学习手记

$1.$

$\frac{1}{2}$ $\frac{1}{2}$
2.

$\left[\begin{array}{cc}0& 1\\ 2& 3\end{array}\right]$
$\begin{bmatrix} 0 &1 \2&3\end{bmatrix}$
4.
$\infty$
$\infty$
5.
\begin{gather*}

\begin{matrix} 0 & 1 \ 1 & 0 \end{matrix}\quad

\begin{pmatrix} 0 & -i \ i & 0 \end{pmatrix}\

\begin{bmatrix} 0 & -1 \ 1 & 0 \end{bmatrix}\quad

\begin{Bmatrix} 1 & 0 \ 0 & -1 \end{Bmatrix}\

\begin{vmatrix} a & b \ c & d \end{vmatrix}\quad

\begin{Vmatrix} i & 0 \ 0 & -i \end{Vmatrix}

\end{gather*}

6.
x \acute{x} ˜ x \tilde{x} ˚ x \mathring{x}
` x \grave{x} ˘ x \breve{x} ˙ x \dot{x}
¯ x \bar{x} ˇ x \check{x} ¨ x \ddot{x}
~ x \vec{x} ˆ x \hat{x}
…
x \dddot{x}
7.
空格     
8.
$\frac{\partial x}{\partial (X_S)}$
$\frac{\partial{x}}{\partial(X_S)}$
9.
$f(x)=\{\begin{array}{ll}0& \text{x=0}\\ 1& \text{x!=0}\end{array}$
$f(x)=
\begin{cases}
0& \text{x=0}\
1& \text{x!=0}
\end{cases}$
10.
$a\cdot b$
$a\cdot b$
11.
${\int }_z^2$
$\int_z^2$