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%%
%% An UIT Edition example
%%
%% Example 09-07-4 on page 172.
%%
%% Copyright (C) 2010 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\usepackage{braket}
\StopShownPreambleCommands
\begin{document}
\[ \Braket{ \phi | \frac{\partial^2}%
{\partial t^2} | \psi }\]
\[ \Set{ {\phi} | \frac{\partial^2}%
{\partial t^2} | \psi }\]
\end{document}
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