%% %% The LaTeX Companion, 2ed (second printing August 2004) %% %% Example 8-2-25 on page 482. %% %% 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{207.0pt} \StartShownPreambleCommands \usepackage{amsmath} \StopShownPreambleCommands \begin{document} \begin{align} x^2+y^2 &= z^2 \label{eq:A} \\ x^3+y^3 &= z^3 \notag \\ x^4+y^4 &= r^4 \tag{$*$} \\ x^5+y^5 &= r^5 \tag*{$*$} \\ x^6+y^6 &= r^6 \tag{\ref{eq:A}$'$} \\ A_1 &= N_0 (\lambda ; \Omega') - \phi ( \lambda ; \Omega') \\ A_2 &= \phi (\lambda ; \Omega') \, \phi (\lambda ; \Omega) \tag*{ALSO (\theequation)} \\ A_3 &= \mathcal{N} (\lambda ; \omega) \end{align} \end{document}