%%
%% Ein Beispiel der DANTE-Edition
%% Mathematiksatz mit LaTeX
%% 3. Auflage
%% Beispiel 11-02-1 auf Seite 240.
%% Copyright (C) 2018 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[10pt]{exaartplain}
\pagestyle{empty}
\setlength\textwidth{146.40707pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\DeclareMathVersion{foo}
\SetMathAlphabet{\mathbf}{foo}{OMS}{cmsy}{m}{n}
\DeclareMathAlphabet{\mathxy}{OT1}{lmr}{bx}{n}
\SetMathAlphabet{\mathxy}{foo}{OT1}{}{}{}
%StopShownPreambleCommands
\begin{document}
[$ \mathbf{y=f(x)} $] [(bold)
\mathversion{bold} $ \mathbf{y=f(x)} $] [(foo)
\mathversion{foo} $ \mathbf{y=f(x)} $
$ \mathxy{y=f(x)} $] [(normal)
\mathversion{normal} $ \mathbf{y=f(x)} $]
\end{document}
