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I have a problem, I try to resize a diagram, this is what I write 

\[
\scalebox{1.4}{  
\begin{CD}  
    C @>\phi>> C'=\phi(C)\\  
    @V\textnormal{Dual}VV\\  
    C^{\perp}@>\phi>> C=\phi(C^{\perp})  
\end{CD}  
}  
\]

And it works, except that I get an error, something like missing $ or extra }, can anyone help me?

Qrrbrbirlbel
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Dimitri
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  • Sorry, but not, i post the example after the people start tell me that i should put an example an no one answer my question... when i put the example nobody else try to help me.... so i don´t knwo what to do... sorry if i did wrong – Dimitri Mar 06 '13 at 03:02
  • @cmhughes my mistake, i copy the wrong example so you thing that was that same question, i was talking about another one – Dimitri Mar 06 '13 at 03:07
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    @Dimitri \scalebox switched back to text-mode and the CD (apparently) expects math-mode. \[\scalebox{1.4}{$\begin{CD} … \end{CD}$}\] probably would work. But we can only guess, if you do not post a complete minimal working example (MWE) so that we can see which class, which packages, etc you use. Which package provides the CD environment for example? It would be easier to us to help you if we could simply copy your code and can compile it without the need to setup everything. – Qrrbrbirlbel Mar 06 '13 at 03:11
  • @Qrrbrbirlbel thanks very much, this works now. I am new in this so i am not familiarize with MWE and those things yet – Dimitri Mar 06 '13 at 03:14
  • @Dimitri A minimal working example (MWE) is a complete, minimal document, starting with \documentclass and ending in \end{document} that shows what you want to achieve or solve. – hpesoj626 Mar 06 '13 at 05:26
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    Isn't this a duplicate of http://tex.stackexchange.com/q/100393/15925 ? – Andrew Swann Mar 06 '13 at 12:15

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