如果以 displaymath 或 itemize 结尾，则阴影定理中的额外垂直空间

Question

我已经创建了自定义阴影定理，但是当以 displaymath 或 itemize/enumerate 环境结束时，会出现额外的垂直空间。

以下是 MWE：

\documentclass{article}

\usepackage{amsthm}
\usepackage{xcolor}
\usepackage{framed}

\newtheoremstyle{thm}
    {0pt} % space above
    {0pt} % space below
    {\rmfamily} % body font
    {} % indent amount
    {\rmfamily} % theorem head font
    {.} % punctuation after theorem head
    {0.5em} % space after theorem head
    {} % theorem head spec

\theoremstyle{thm}
\newtheorem{boilerexample}[section]{Example}
\newenvironment{example}
   {\colorlet{shadecolor}{teal!15}\begin{shaded}\begin{boilerexample}}
   {\end{boilerexample}\end{shaded}}

\begin{document}
    
    \begin{example}
        This is an example.
    \end{example}

    \begin{example}
        This is an example that ends with displaymath.
        \[ \sum_{k=1}^\infty \frac{1}{k} \]
    \end{example}

    \begin{example}
        This is an example that ends with an itemize environment.
        \begin{itemize}
            \item This is an item.
        \end{itemize}
    \end{example}

\end{document}

输出如下：

第二和第三环境中的额外垂直空间是不可取的。有办法解决这个问题吗？

Answer 1

这可能会起作用：最后一个垂直跳跃被移除。

\documentclass{article}

\usepackage{amsthm}
\usepackage{xcolor}
\usepackage{framed}

\newtheoremstyle{thm}
    {0pt} % space above
    {0pt} % space below
    {\rmfamily} % body font
    {} % indent amount
    {\rmfamily} % theorem head font
    {.} % punctuation after theorem head
    {0.5em} % space after theorem head
    {} % theorem head spec

\theoremstyle{thm}
\newtheorem{boilerexample}[section]{Example}
\newenvironment{example}
   {\colorlet{shadecolor}{teal!15}\begin{shaded}\begin{boilerexample}}
   {%
    \end{boilerexample}%
    \par\removelastskip
    \end{shaded}
   }

\begin{document}
    
    \begin{example}
        This is an example.
    \end{example}

    \begin{example}
        This is an example that ends with displaymath.
        \[ \sum_{k=1}^\infty \frac{1}{k} \]
    \end{example}

    \begin{example}
        This is an example that ends with an itemize environment.
        \begin{itemize}
            \item This is an item.
        \end{itemize}
    \end{example}

\end{document}