我们在输入多行公式的时候,split,array,multiline,align,aligned等等都是我们可以选用的环境,这里介绍split的使用方法。演示效果图: 演示代码:\documentclass{article}\pagestyle{empty}\setcounter{page}{6}\setlength\textwidth{330.59894pt}\usepackage{CJK}\usepackage{amsmath}\newcommand\relphantom[1]{\mathrel{\phantom{#1}}}\newcommand\ve{\varepsilon} \newcommand\tve{t_{\varepsilon}}\newcommand\vf{\varphi} \newcommand\yvf{y_{\varphi}}\newcommand\bfE{\mathbf{E}}\begin{CJK}{GBK}{song}\begin{document}\begin{equation} \begin{split} (a + b)^4 &= (a + b)^2 (a + b)^2 \\ &= (a^2 + 2ab + b^2) (a^2 + 2ab + b^2) \\ &= a^4 + 4a^3b + 6a^2b^2 + 4ab^3 + b^4 \end{split}\end{equation}\begin{equation} \begin{split} (a + b)^3 &= (a + b) (a + b)^2 \\ &= (a + b)(a^2 + 2ab + b^2) \\ &= a^3 + 3a^2b + 3ab^2 + b^3 \end{split}\end{equation}\begin{equation} \begin{split} f_{h, \ve}(x, y) &= \ve \bfE_{x, y} \int_0^{\tve} L_{x, \yvf(\ve u)} \vf(x) \,du \\ &= h \int L_{x, z} \vf(x) \rho_x(dz) \\ &\relphantom{=} {} + h \biggl[ \frac{1}{\tve} \biggl( \bfE_{y} \int_0^{\tve} L_{x, y^x(s)} \vf(x) \,ds - \tve \int L_{x, z} \vf(x) \rho_x(dz) \biggr) + \\ &\relphantom{=} \phantom{{} + h \biggl[ } \frac{1}{\tve} \biggl( \bfE_{y} \int_0^{\tve} L_{x, y^x(s)} \vf(x) \,ds - \bfE_{x, y} \int_0^{\tve} L_{x, \yvf(\ve s)} \vf(x) \,ds \biggr) \biggr]\end{split} \end{equation}\end{CJK}\end{document}
from: http://blog.sina.com.cn/s/blog_5e16f1770100groj.html
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