%%
%% The LaTeX Companion, 3ed
%%
%% Example 3-2-4 on page I-150 in "extdash and amsmath --- Dashes in text".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.0pt}

%StartShownPreambleCommands
   \usepackage{amsmath}
     \newcommand\p{$p$\nobreakdash}   % for "\p-adic"
     \newcommand\Ndash{\nobreakdash--}% "3\Ndash 9"
   \usepackage[shortcuts]{extdash}
     \newcommand\n[1]{$n$\-/}         % "\n-dimensional"
%StopShownPreambleCommands

\begin{document}
   \noindent  The generalization to the \n-dimensional
   case---using the standard \p-adic topology---can be
   found on Pages 3\Ndash 9 of Volume IV.

   Compare the above em\-/dashes to the \verb=\Emdash=
   command\---this leaves a small space on either side.
\end{document}