mathjax公式

• \(\delta\): \delta
• \(\Delta\): \Delta
• \(\int\): \int
• \(\iint\): \iint
• \(\approx\): \approx
• \(\theta\): \theta
• \(\alpha\): \alpha
• \(\cdots\): \cdots
• \(\prod\): \prod
• \(\times\): \times
• \(a\over{b}\): a\over{b}
• \(\partial\): \partial
• \(\vec{a}\): \vec{a}
• \(1 \choose n\): 1 \choose n
• \(\omega\): \omega
• \(\Omega\): \Omega
• 矩阵
  \[ \begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ \vdots & \vdots & \vdots \\ \end{bmatrix} \]

\begin{bmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
\vdots & \vdots & \vdots \\
\end{bmatrix}

• 分段函数

\[ f(x) = \begin{cases} x + 1 & x \gt 1 \\ 2x & others \end{cases} \]

f(x) = \begin{cases}
x + 1 & x \gt 1 \\
2x & others
\end{cases}