%% %% An UIT Edition example %% %% Example 09-17-14 on page 194. %% %% 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{129.70511pt} \AtBeginDocument{\setlength\parindent{0pt}} \StartShownPreambleCommands \usepackage{mathtools} \DeclarePairedDelimiter\abs{\lvert}{\rvert} \StopShownPreambleCommands \begin{document} \[ \abs{a} ~ \abs{\frac{a}{b}} ~ \abs*{\frac{a}{b}} \] \[ \abs[\big]{\frac{a}{b}} ~ \abs[\bigg]{\frac{a}{b}} \] \end{document}