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How can the first { and last } in the following be made larger?

  $A =\left \{a \notin\{1, 2\}, \ b\notin \{4,5\}\right\}$.
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\big or similar- have a look at the Not so short guide to LaTeX –  cmhughes Nov 19 '12 at 5:01
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1 Answer

up vote 11 down vote accepted

There are several ways to increase the height of the braces:

  1. Use a \vphantom{} inside the \left\{ and \right\} so that the content appears to have greater height causing the size of the braces to increase:

    $B =\left\{ \vphantom{y^2} a \notin \{1, 2\} \right\}$
    
  2. Specify a fixed size of the brace (as cmhughes sugested):

    $C =\big\{ \vphantom{y^2} a \notin \{1, 2\} \big\}$
    
  3. Or use automatic growth for nested parenthesis as per automatic size adjustment for nested parentheses:

    \setlength\delimitershortfall{-2pt}
    $D =\left\{ a \notin \{1, 2\}  \right\}$
    

References:

Fixed Size:

Automatic Re-size:


enter image description here

Code:

\documentclass{article}
\usepackage{amsmath}

\begin{document}
$A =\left\{ \{1, 2\} \right\}$,
$B =\left\{ \vphantom{y^2} \{1, 2\} \right\}$,
$C =\big\{ \{1, 2\} \big\}$,
\setlength\delimitershortfall{-2pt}
$D =\left\{ \{1, 2\}  \right\}$.
\end{document}
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Thank you very much. –  user12290 Nov 21 '12 at 3:23
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