%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 7-6-3 on page 377.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% 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.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.0pt}
\StartShownPreambleCommands
\usepackage{mathptmx,bm}
\StopShownPreambleCommands
\begin{document}
Bold is difficult to achieve: {\boldmath$\alpha
 \neq A$} and at best looks questionable:
$A \neq \mathbf{A} = \bm\alpha - \bm\gamma$.
\end{document}