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I want to wrap 2 or more cases in right curly brace using the MathTıme Professional II font. When I use 2 lines it seems to work, but with 3 or more it doesn't show correctly. I've used this code :

\documentclass{article}
  \usepackage{amsmath}
  \usepackage[lite]{mtpro2}
  \begin{document}

  $\left.
    \begin{aligned}
      &\frac{\sqrt{9}}{\sqrt{16}}=\frac{3}{4}=0,75\;\\ % use \quad as spacer between  equation and right brace
      &\sqrt{\frac{9}{16}}=\sqrt{0,5625}=0,75
      \end{aligned}
      \right\}\Rightarrow \frac{\sqrt{9}}{\sqrt{16}}=\sqrt{\frac{9}{16}}$
    \end{document}
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Shows correctly for me. What problem do you see? Maybe you could add a picture. –  mafp Apr 6 '13 at 7:57
    
It shows the normal brace of the amsmath package. –  mac Apr 6 '13 at 8:03
2  
Note: write 0{,}5625 instead of 0,5625 in order to get the correct spacing. –  Svend Tveskæg Apr 6 '13 at 9:12
    
You re right. I use a special package for the comma decimal mark but i think this way is better. –  mac Apr 6 '13 at 16:46

1 Answer 1

up vote 5 down vote accepted

This is expected behaviour, see Section 2.12.2 of the documentation. If You want a curly brace here, use the \LEFTRIGHT.\}{...} construct. The period is the empty left delimiter here.

\documentclass{article}
  \usepackage{amsmath}
  \usepackage{mtpro2}
\begin{document}
\[%
  \LEFTRIGHT.\}{%
    \begin{aligned}
      &\frac{\sqrt{9}}{\sqrt{16}}=\frac{3}{4}=0,75\;\\ % use \quad as spacer between equation and right brace
      &\sqrt{\frac{9}{16}}=\sqrt{0,5625}=0,75
      \end{aligned}
    }%
    \Rightarrow \frac{\sqrt{9}}{\sqrt{16}}=\sqrt{\frac{9}{16}}
\]
\end{document}

sample output

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There are predefined ones as \PAREN{…}. By the way, may be it would be good to add the \SQRT{…} construction, which gives you the slanted \sqrt sign for bigger sizes. –  Manuel Apr 6 '13 at 10:15
    
@Manuel \PARENS{...} gives (round) parentheses, I don't see where this should be used here. Regarding the roots: the OP didn't asked for different roots, so I'll leave it at that. –  mafp Apr 6 '13 at 10:37
    
Just to add some info about special commands from the mtpro2 package. But if you think that you shouldn't add that info, ok, I just pointed it. –  Manuel Apr 6 '13 at 12:10

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