居中对齐多个方程式

Question

我正在尝试使用对齐、聚集和居中功能将多个方程式居中，但目前还无法完成。我该怎么做？图片显示了我想要的。谢谢

\documentclass{article}

\usepackage{amssymb,amsmath}

\begin{document}

\begin{equation}
\Delta l_{x}|_{x=l_x} = 0.001l_x 
\Delta l_{x}|_{x=0} = \Delta l_{y}|_{y=l_y} = \Delta l_{y}|_{y=0} = \Delta l_{z}|_{z=z} = \Delta l_{z}|_{z=0} =0
\end{equation}


\end{document}

Answer 1

使用gathered或gather取决于你是否想要共享方程编号

\documentclass{article}

\usepackage{amssymb,amsmath}

\begin{document}

equation
\begin{equation}
  \begin{gathered}
\Delta l_{x}|_{x=l_x} = 0.001l_x \\
\Delta l_{x}|_{x=0} = \Delta l_{y}|_{y=l_y} = \Delta l_{y}|_{y=0} = \Delta l_{z}|_{z=z} = \Delta l_{z}|_{z=0} =0    
  \end{gathered}
\end{equation}

gather
\begin{gather}
\Delta l_{x}|_{x=l_x} = 0.001l_x \\
\Delta l_{x}|_{x=0} = \Delta l_{y}|_{y=l_y} = \Delta l_{y}|_{y=0} = \Delta l_{z}|_{z=z} = \Delta l_{z}|_{z=0} =0
\end{gather}


\end{document}