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%%
%% Ein Beispiel der DANTE-Edition
%% Mathematiksatz mit LaTeX
%% 2. Auflage
%%
%% Beispiel 04-11-6 auf Seite 65.
%%
%% 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{352.81416pt}
\makeatletter
\def\@bracketheight{2pt}
\def\overbracket{\@ifnextchar[{\@overbracket}{\@overbracket[\@bracketheight]}}
\def\@overbracket[#1]{\@ifnextchar[{\@over@bracket[#1]}{\@over@bracket[#1][0.3em]}}
\def\@over@bracket[#1][#2]#3{%\message {Overbracket: #1,#2,#3}
\mathop {\vbox {\m@th \ialign {##\crcr \noalign {\kern 3\p@
\nointerlineskip }\downbracketfill {#1}{#2}
\crcr \noalign {\kern 3\p@ }
\crcr $\hfil \displaystyle {#3}\hfil $%
\crcr} }}\limits}
\def\downbracketfill#1#2{$\m@th \setbox \z@ \hbox {$\braceld$}
\edef\@bracketheight{\the\ht\z@}\downbracketend{#1}{#2}
\leaders \vrule \@height #1 \@depth \z@ \hfill
\leaders \vrule \@height #1 \@depth \z@ \hfill
\downbracketend{#1}{#2}$}
\def\downbracketend#1#2{\vrule depth #2 width #1\relax}
\makeatother
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\StopShownPreambleCommands
\begin{document}
\setlength\arraycolsep{0pt}
$\begin{array}{@{}ccccc@{}}
\textrm{Hasse \LaTeX\ }
& \overbracket[0.5pt]{1\rightarrow2\rightarrow3\rightarrow4}
& \overbracket[0.75pt][0.75em]{\rightarrow5\rightarrow6\rightarrow7}
& \overbracket[1pt][1em]{\rightarrow8\rightarrow9\rightarrow10}
& \textrm{\ Liebe \LaTeX}\\
& \textrm{wenig} & \textrm{mittel} & \textrm{viel}
\end{array}$
\end{document}
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