拆分环境中的方程式对齐

Question

\documentclass[12 pt]{article}

\usepackage{graphicx,epsfig,setspace,subfig,url,amsmath}
\usepackage{setspace}
\usepackage{indentfirst}
\usepackage{listings}
\usepackage{array}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{enumerate}
\usepackage[english]{babel}
%\usepackage{fontspec}
\usepackage{booktabs}
\usepackage{float}
\usepackage{breqn}
\usepackage{tikz}
\usepackage{graphicx,epsfig,setspace,subfig,url,amsmath}
\usepackage{indentfirst}
\usepackage{listings}
\usepackage{array}
\usepackage[margin=1in]{geometry}  % choose whatever margins suit you best
\usepackage{amsmath} % amsmath package provides 'split' environment
\usepackage{qtree}
\usepackage{enumerate}
\usepackage{tikz}
\usepackage{fancyhdr} % Required for custom headers
\usepackage{lastpage} % Required to determine the last page for the footer
\usepackage{extramarks} % Required for headers and footers
\usepackage{graphicx} % Required to insert images
\usepackage{lipsum} % Used for inserting dummy 'Lorem ipsum' text into the template
\usepackage{amssymb,amsmath}
\usepackage{natbib}
\begin{document}
\begin{equation*}
\begin{split}
F = \{F_{x} \in  F_{c} &: (|S| > |C|) \\
 &\quad \cap (\text{minPixels}  < |S| < \text{maxPixels}) \\
 &\quad \cap (|S_{\text{conected}}| > |S| - \epsilon) \}




    \end{split}
    \end{equation*}


    \begin{equation*}
    \begin{split}


    B'&=-\partial \times E,\\
        E'&=\partial \times B - 4\pi j,

    \end{split}
    \end{equation*}


\end{document}

Answer 1

我不知道这是否是你想要的：

\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\begin{document}
\begin{align*}
  F  &= \begin{array}[t]{@{}r@{\;}l@{}}
      \bigl\{F_x \in F_c : & (|S| > |C|) \\
                      & {}\cap (\text{minPixels} < |S| < \text{maxPixels}) \\
                      & {}\cap (|S_{\text{conected}}| > |S| - \epsilon) \bigr\}
    \end{array} \\
  B' &= -\partial \times E, \\
  E' &= \partial \times B - 4\pi j,
\end{align*}
\end{document}