如何拥有可重述的 tcolorbox 定理环境,同时避免标签被多次定义

如何拥有可重述的 tcolorbox 定理环境,同时避免标签被多次定义

我有一份文档,我想先在其中定义一个定理,然后在需要证明它的时候重新陈述相同的定理。

通常这可以使用thm-restate包来完成。但是,我的文档中的定理使用 tcolorbox 环境,因此我尝试使用这个答案

这种方法适用于重述定理,但 LaTeX 会发出有关标签“多重定义”的警告。由于这个错误,我无法正确引用重述定理。

我的问题:我怎样才能重述 tcolorbox 定理,而不遇到标签重复的问题?

以下是展示设置和问题的最小示例:

\documentclass{article}

\usepackage{amsmath}
\usepackage[colorlinks=true, allcolors=blue]{hyperref}
\usepackage{cleveref}

\usepackage{tcolorbox}
\tcbuselibrary{theorems}
\tcbuselibrary{magazine}
\usepackage{amsthm}

\theoremstyle{definition}

% The tcolorbox theorem
\newtcbtheorem{theorem}{Theorem}{colback=gray!10,colframe=gray!40!black}{theorem}

% Commands to restate the theorem
\newcommand{\recallthm}[2][1]{\par\noindent\useboxarray[#2]{#1}}
\usepackage{environ}
\NewEnviron{restatablethm}[2]{%
\newboxarray{#2}%
\begin{theorem}[reset box array=#2, store to box array=#2]{#1}{#2}
    \BODY%
\end{theorem}%
\recallthm{#2}%
}

% Other theorem environments might be on the same counter
\newtheorem{lemma}[tcb@cnt@theorem]{Lemma}

\begin{document}

    % The first theorem
    \begin{restatablethm}{Serious Algorithm}{coollabel}
        An example boxed theorem..
    \end{restatablethm}

    \begin{lemma}
        A simple lemma.
    \end{lemma}

    % The restated theorem
    \recallthm{coollabel}

    By \Cref{thm:collabel} we are done. % The reference here does not work (yields ??). 

\end{document}

答案1

这使用 [nophantom] 创建可调用框,但不创建原始框。它仍会生成有关重复超目标的警告,以及有关发货框的警告。 \Cref根本不起作用,即使theorem:coollabel@cref创建了标签。

\documentclass{article}

\usepackage{amsmath}
\usepackage[colorlinks=true, allcolors=blue]{hyperref}
\usepackage{cleveref}

\usepackage{tcolorbox}
\tcbuselibrary{theorems}
\tcbuselibrary{magazine}
\usepackage{amsthm}

\theoremstyle{definition}

% The tcolorbox theorem
\newtcbtheorem{theorem}{Theorem}{colback=gray!10,colframe=gray!40!black}{theorem}

% Commands to restate the theorem
\newcommand{\recallthm}[2][1]{\par\noindent\useboxarray[#2]{#1}}
\usepackage{environ}
\makeatletter
\NewEnviron{restatablethm}[2]{% print this copy
\newboxarray{#2}%
\begin{theorem}[reset box array=#2, store to box array=#2,nophantom]{#1}{#2}
    \BODY%
\end{theorem}%
\addtocounter{tcb@cnt@theorem}{-1}%
\begin{theorem}{#1}{#2}
    \BODY%
\end{theorem}%
%\recallthm{#2}%
}

% Other theorem environments might be on the same counter
\newtheorem{lemma}[tcb@cnt@theorem]{Lemma}

\begin{document}

    % The first theorem
    \begin{restatablethm}{Serious Algorithm}{coollabel}
        An example boxed theorem..
    \end{restatablethm}

    \begin{lemma}
        A simple lemma.
    \end{lemma}

    % The restated theorem
    \recallthm{coollabel}

    By \ref{theorem:coollabel} we are done. % The reference here does not work (yields ??). 

\end{document}

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