%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 8-8-6 on page 511.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{87.0pt}
%
% Special setting to make delimiters always grow in this example
\setlength\delimitershortfall{-3pt}

\StartShownPreambleCommands
\usepackage{bm}
\StopShownPreambleCommands
\begin{document}
$\bm{\Biggl\lbrace\biggl\lbrace\Bigl\lbrace\bigl\lbrace \lbrace
     \mathcal{Q}
     \rangle \bigr\rangle\Bigr\rangle\biggr\rangle\Biggr\rangle}$
\end{document}