Thmtools 错误：headformat 未知

Question

我使用下面给出的代码使用 thmtools 创建定理框，但出现错误：Package thmtools Error: \declaretheorem key `headformat' not known。

根据thmtools文档，headformat是 的有效参数declaretheoremstyle。所以我不明白错误是什么。请帮忙。

\documentclass[11pt]{book}

%% boxed theorems
\usepackage{thmtools}
\usepackage{etoolbox}
\declaretheoremstyle[numberwithin=chapter,
                    shaded={rulecolor=black!50, textwidth=0.95\linewidth, margin=0.8em, rulewidth=1pt, bgcolor={rgb}{0.9,0.9,0.9}},
                    headformat={\NAME~\NUMBER\hfill\NOTE\smallskip\linebreak}
                    ]{sthm}

\declaretheorem[style=sthm]{hypothesis}


\begin{document}

\begin{hypothesis}[hypothesis name]
    Some hypothesis
\end{hypothesis}

\end{document}

Answer 1

正如评论中提到的，您需要加载xcolor和amsthm。我还添加了，headpunct={}因为大概您不希望在行首出现一个杂散的句号。

\documentclass[11pt]{book}

%% boxed theorems
\usepackage{xcolor}
\usepackage{amsthm}
\usepackage{thmtools}
\usepackage{etoolbox}
\declaretheoremstyle[numberwithin=chapter,
                    shaded={rulecolor=black!50, textwidth=0.95\linewidth, margin=0.8em, rulewidth=1pt, bgcolor={rgb}{0.9,0.9,0.9}},
                    headformat={\NAME~\NUMBER\hfill\NOTE\smallskip\linebreak},
                    headpunct={}
                    ]{sthm}

\declaretheorem[style=sthm]{hypothesis}


\begin{document}

\begin{hypothesis}
    Some hypothesis
\end{hypothesis}

\begin{hypothesis}[hypothesis name]
    Some hypothesis
\end{hypothesis}

\end{document}