对所有定理的内容进行装箱，但不对定理标题进行装箱

Question

我为示例创建了一个定理环境，并希望将它们放在标题下方。

\documentclass{book}
\usepackage{amsmath}
\usepackage{amsthm}

\newtheoremstyle{break}                                                                 
{5mm}                                                                                   
{5mm}                                                                                   
{}                                                                                      
{}                                                                                      
{\bfseries}                                                                         
{}                                                                                      
{\newline}                                                                              
{}                                                      
\theoremstyle{break}                                                                    
\newtheorem{exmp}{Example}

\begin{document}

\begin{exmp}
This text should be framed in a box, but not the heading "Example".
\end{exmp}

\end{document}

我可以\fbox{}在这个 newtheorenstyle 中添加一个，以便我可以使用\begin{exmp} Text text text \end{exmp}，并且“文本文本文本”将位于框架框内吗？

Answer 1

我强烈建议你看看按钮盒它正是为了这个目的而创建的。

下列：

\documentclass{book}
\usepackage{amsmath}
\usepackage{amsthm}

\usepackage%[nounderline]
{thmbox}
\newtheorem[L]{thm}{Theorem}[section]
\newtheorem[L]{ex}[thm]{Example}


\begin{document}

\begin{ex}
Some text, some more text, a sufficient amount to get a full box with several lines.
\end{ex}

\vspace{45em}

\begin{ex}
Some text, some more text, a sufficient amount to get a full box with several lines.
Some text, some more text, a sufficient amount to get a full box with several lines.
Some text, some more text, a sufficient amount to get a full box with several lines.
Some text, some more text, a sufficient amount to get a full box with several lines.
Some text, some more text, a sufficient amount to get a full box with several lines.
Some text, some more text, a sufficient amount to get a full box with several lines.
\end{ex}



\end{document}



\end{document}

几乎可以生成您想要的内容：

并完美地打破：

请参阅手册以了解更多调整选项，但我相信这会比您的“手工制作”解决方案更为优雅。

Answer 2

这完成了：

\documentclass{book}
\usepackage{amsmath}
\usepackage{amsthm}

\newtheoremstyle{break}                                                                 
{5mm}                                                                                   
{5mm}                                                                                   
{}                                                                                      
{}                                                                                      
{\bfseries}                                                                         
{}                                                                                      
{\newline}                                                                              
{}                                                      
\theoremstyle{break}                                                                    
\newtheorem{exmp}{Example}

\newcommand{\example}[1]{%
\begin{exmp}\framebox[\textwidth][l]{#1}%
\end{exmp}}

\begin{document}

\example{Text text text}

\end{document}

框架是主体的宽度，里面的示例是左对齐的。