info/examples/Math/09-07-4.ltx


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%% 
%%  Ein Beispiel der DANTE-Edition
%%  Mathematiksatz mit LaTeX
%%  2. Auflage
%% 
%%  Beispiel 09-07-4 auf Seite 183.
%% 
%%  Copyright (C) 2012 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{142.324pt}
\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}