集合内的断线

Question

我该如何写

\[A=\Bigg\{\alpha\in \mathbb{Z}G : \alpha\ \text{is a unit in}\ \mathbb{Z}G\ \text{with}\ \varepsilon(\alpha)=1\ \text{and}\ \alpha+\Delta(G,G')\ \text{has finite multiplicative order in}\  \mathbb{Z}G/\Delta(G,G') \Bigg\}\]

这样看起来

虽然我尝试使用，但\\效果不佳，而且也没有多行。

这就是我要问的——

Answer 1

如果有必要的话，我会使用align*允许使用更多线路的功能。

另外，我会使用单个句子中的所有文本\text{}，并将$ $其用于数学内容。

\begin{align*}
A=\bigl\{\alpha\in \mathbb{Z}G :{}& \text{$\alpha$ is a unit in $\mathbb{Z}G$ with $\varepsilon(\alpha)=1$}\\ 
  & \text{and $\alpha+\Delta(G,G')$ has finite multiplicative order in $\mathbb{Z}G\mathbin{/}\Delta(G,G')$} \bigr\}
\end{align*}

平均能量损失

\documentclass{report}
\usepackage{amsmath,amsfonts}
\usepackage{lipsum} % dummy text

\begin{document}
\lipsum*[2]
\begin{align*}
  A=\bigl\{
        \alpha\in \mathbb{Z}G
   :{}& 
   \text{$\alpha$ is a unit in $\mathbb{Z}G$ with $\varepsilon(\alpha)=1$}\\ 
   &    \text{and $\alpha+\Delta(G,G')$ has finite multiplicative order}\\
   &    \text{in $\mathbb{Z}G\mathbin{/}\Delta(G,G')$} 
    \bigr\}
\end{align*}
Solution proposed by \texttt{@daleif}.
\[ A=\bigl\{ \alpha\in \mathbb{Z}G :
   \parbox[t]{.7\linewidth}{\raggedright%
   $\alpha$ is a unit in $\mathbb{Z}G$ with $\varepsilon(\alpha)=1$ and $\alpha+\Delta(G,G')$ has finite multiplicative order in $\mathbb{Z}G\mathbin{/}\Delta(G,G') \bigr\}$.
   }
\]
\lipsum*[2]
\[ A=\left\{\ \parbox[c]{.8\linewidth}{%\raggedright%
   $\alpha\in \mathbb{Z}G : \alpha$ is a unit in $\mathbb{Z}G$ with $\varepsilon(\alpha)=1$ and $\alpha+\Delta(G,G')$ has finite multiplicative order in $\mathbb{Z}G\mathbin{/}\Delta(G,G') \bigr\}$.
   }\ \right\}
\]

\end{document}