%%
%% Der LaTeX-Begleiter, zweite Auflage (September 2005)
%%
%% Beispiel 8-3-5 von Seite 500.
%%
%% Copyright (C) 2005 Frank Mittelbach, Michel Goossens,
%% Johannes Braams, David Carlisle, and Chris Rowley
%%
%% Uebersetzung: Copyright (C) 2005 Claudia Krysztofiak,
%% Rebecca Stiels und Frank Mittelbach
%%
%% 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{lb2exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{125.4372pt}
\StartShownPreambleCommands
\usepackage{amsmath}
\StopShownPreambleCommands
\begin{document}
\begin{gather}
\sum_{\substack{0 \le i \le m \\ 0 < j < n}} P(i, j) \\
\sum_{\begin{subarray}{l} i \in \Lambda \\
0 \le i \le m \\
0 < j < n
\end{subarray}} P(i, j)
\end{gather}
\end{document}
