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%%
%% An UIT Edition example
%%
%% Example 06-11-4 on page 106.
%%
%% 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{375.57637pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{54}
\renewcommand\theequation{6.\arabic{equation}}
\StartShownPreambleCommands
\usepackage{amsmath}
\makeatletter
\let\oldTagForm\tagform@
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces*#1*\unskip\@@italiccorr}}
\makeatother
\StopShownPreambleCommands
\begin{document}
\begin{align}
c^2 &\le a^2 + b^2\label{eq:pyth0}\\
\left|\sum_{i=1}^n a_ib_i\right| &\le \left(\sum_{i=1}^n a_i^2\right)^{1/2}
\left(\sum_{i=1}^n b_i^2\right)^{1/2}\label{eq:pyth1}
\end{align}
\makeatletter\let\tagform@\oldTagForm\makeatother
\begin{align}\label{eq:pyth2} c^2 &\le a^2 + b^2 \end{align}
A reference to eq.~\eqref{eq:pyth0}, eq.~\eqref{eq:pyth1} and
eq.~\eqref{eq:pyth2}.
\end{document}
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