%% %% An UIT Edition example %% %% Example 10-09-2 on page 216. %% %% 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} \usepackage[utf8]{inputenc} \usepackage[english]{babel} \AtBeginDocument{\setlength\parindent{0pt}} \setcounter{equation}{24} \renewcommand\theequation{10.\arabic{equation}} \StartShownPreambleCommands \usepackage{amsmath,array} \AtBeginDocument{\setlength\tabcolsep{0pt} \renewcommand\arraystretch{0} \setlength\abovedisplayskip{0pt} \setlength\abovedisplayshortskip{0pt} \setlength\belowdisplayskip{0pt} \setlength\belowdisplayshortskip{0pt}} \newcommand*{\diff}{\mathop{}\!\mathrm{d}} \StopShownPreambleCommands \begin{document} \begin{subequations} \begin{tabular}{@{}*{2}{m{0.5\linewidth}}@{}} \begin{align} \oint E \mathrm{d}s=0 \end{align} & \begin{align} \nabla\times B=0 \label{sub:foo}\end{align}\\ \begin{align} a =\frac{c}{d} \end{align} & \begin{align} b = 1 \end{align} \\ \begin{align} c =1 \label{sub:baz}\end{align} & \begin{align} \int 2x\diff x = x^2+C \end{align} \end{tabular}\par All subequations can be referenced in the usual way. For example, equations~\eqref{sub:foo} and~\eqref{sub:baz} are given correctly with their letters. The label has to be set correctly of course. \end{subequations} \end{document}