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I am given the follwoing theorem setup, which I have to use.

\numberwithin{equation}{chapter}  
\newtheorem{theorem}{Theorem}[chapter]  
\newtheorem{definition}[theorem]{Definition}  
\newtheorem{proposition}[theorem]{Proposition}  
\theoremstyle{nonumberplain}  
\theorembodyfont{\normalfont}  
\theoremsymbol{\ensuremath{\square}}  
\newtheorem{proof}{Proof}

How is it possible to restate a theorem with the same number as when stated first. I don't mind if I have to rewrite the theorem or even put the number in by hand, because I only need it once.

  • does it help? tex.stackexchange.com/questions/422/… – Ignasi Feb 19 at 12:16
  • I tried several option from this question already. But none seemed to work. – MatheMarco Feb 19 at 12:34
  • Then I propose you provide a complete and minimal document (from \documentclass to \end{document}) with an example of what have you tested and doesn't work. – Ignasi Feb 19 at 12:43
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I solved my problem by changing the setup a bit.

\numberwithin{equation}{chapter}  
\newtheorem{theorem}{Theorem}[chapter]  
\newtheorem{definition}[theorem]{Definition}  
\newtheorem{proposition}[theorem]{Proposition}  
\newtheorem*{thm345}{Theorem 3.45}
\theoremstyle{nonumberplain}  
\theorembodyfont{\normalfont}  
\theoremsymbol{\ensuremath{\square}}  
\newtheorem{proof}{Proof}

Now using:

\begin{thm345}
theorem text
\end{thm345}

gives me what I want

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