在方程式和右括号之间创建一些水平空间

Question

我尝试使用以下右括号类型：

$$\begin{rcases}
  a &= b + c \\
  d &= e + f + g \\
  h &= i + j + k + l
\end{rcases}$$

但是我注意到括号离方程式太近了，我是否可以在两者之间留出一些间距？

Answer 1

两种解决方案：

\documentclass[12pt,a4paper]{report}
\usepackage{empheq}

\begin{document}

\begin{empheq}[right=\enspace\empheqrbrace]{align*}
a &= b + c \\
d &= e + f + g \\ 
h &= i + j + k + l 
\end{empheq}
    \vskip 3ex
\[ \begin{rcases}
a &= b + c \\
d &= e + f + g \\
h &= i + j + k + l \;
\end{rcases} \]%

\end{document} 

Answer 2

您不想用于rcases此，但是aligned。

\documentclass{article}
\usepackage{mathtools}

\begin{document}

This is not the best way to cope with a system
\[
\begin{rcases}
  a &= b + c \\
  d &= e + f + g \\
  h &= i + j + k + l
\end{rcases}
\]
A better way is to use \texttt{aligned} as in the example below
\[
\left.
\begin{aligned}
  a &= b + c \\
  d &= e + f + g \\
  h &= i + j + k + l
\end{aligned}
\right\rbrace
\]
or, if you want some more space next to the brace,
\[
\left.
\begin{aligned}
  a &= b + c \\
  d &= e + f + g \\
  h &= i + j + k + l
\end{aligned}
\;\right\rbrace
\]
Never use \verb|$$| in \LaTeX. Ever.

\end{document}