latex之插入数学公式
1.
\begin{eqnarray} Ly = \lambda y \end{eqnarray}
2.
\begin{gather*} \begin{split} b=1\\ a=b \end{split}\\[6pt] \end{gather*}
3.
\begin{gather*} \begin{split} a &= m\\ &= k \end{split}\\[6pt] \begin{align} b &= i ,\\ c &= j \end{align} \end{gather*}
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