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%% The LaTeX Companion, 3ed
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%% Example 11-5-2 on page II-181 in "Ellipsis and other kinds of \protect \ldots  ".
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%% Copyright (C) 2022 Frank Mittelbach
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%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
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%% See https://www.latex-project.org/lppl.txt for details.
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\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}

%StartShownPreambleCommands
\usepackage{amsmath}
%StopShownPreambleCommands

\begin{document}
A series $H_1, H_2, \dotsc\,$, a sum
$H_1 + H_2 + \dotsb\,$, an orthogonal product
$H_1 \times H_2 \times \dotsm\,$, and an infinite
integral:   \[ \int_{H_1} \int_{H_2} \dotsi \;
                              {-\Gamma}\, d\Theta \]
\end{document}