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%%
%% Der LaTeX-Begleiter, zweite Auflage (September 2005)
%%
%% Beispiel 8-7-11 von Seite 520.
%%
%% Copyright (C) 2005 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% Uebersetzung: Copyright (C) 2005 Claudia Krysztofiak,
%%    Rebecca Stiels und Frank Mittelbach
%%
%% 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{lb2exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{149.4372pt}

\StartShownPreambleCommands
\usepackage{amsmath}
\StopShownPreambleCommands
\begin{document}
\begin{align*}
 f_p (x) &= \begin{cases}
   \frac{1}{\smash[b]{p}}              & x = p  \\
   \frac{\strut
	 \smash[t]{\frac{(1 - x)^{\frac{1}{2}}}
			{ x - \sin (x - p)    }}}
	{\sqrt{1 - p} \, \cos (x - p)} & x \neq p
 \end{cases}
\end{align*}
\end{document}