%% %% The LaTeX Companion, 2ed (second printing August 2004) %% %% Example 8-2-6 on page 472. %% %% 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{ttctexamargin} \pagestyle{empty} \setcounter{page}{6} \setlength\textwidth{183.0pt} \StartShownPreambleCommands \usepackage{amsmath} \StopShownPreambleCommands \begin{document} \begin{multline} \tag{2} \sum_{t \in \mathbf{T}} \int_a^t \biggl\lbrace \int_a^t f(t - x)^2 \, g(y)^2 \,dx \biggr\rbrace \,dy \\ = \sum_{t \notin \mathbf{T}} \int_t^a \biggl\lbrace g(y)^2 \int_t^a f(x)^2 \,dx \biggr\rbrace \,dy \end{multline} \setlength\multlinegap{0pt} \begin{multline} \tag{2} \sum_{t \in \mathbf{T}} \int_a^t \biggl\lbrace \int_a^t f(t - x)^2 \, g(y)^2 \,dx \biggr\rbrace \,dy \\ = \sum_{t \notin \mathbf{T}} \int_t^a \biggl\lbrace g(y)^2 \int_t^a f(x)^2 \,dx \biggr\rbrace \,dy \end{multline} \end{document}