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% \begin{center}
%   \textbf{GNU Free Documentation License}
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% published under this License somewhere other than this
% MMC, and subsequently incorporated in whole or in part
% into the MMC, (1) had no cover texts or invariant
% sections, and (2) were thus incorporated prior to November
% 1, 2008.
%
% The operator of an MMC Site may republish an MMC contained
% in the site under CC-BY-SA on the same site at any time
% before August 1, 2009, provided the MMC is eligible for
% relicensing.
%
% \begin{center}
%   \textbf{\Large ADDENDUM: How to use this License for
%   your documents}
% \end{center}
%
% To use this License in a document you have written,
% include a copy of the License in the document and put the
% following copyright and license notices just after the
% title page:
%
% \bigskip
% \begin{quote}
%   Copyright \copyright{}  YEAR  YOUR NAME.
%   Permission is granted to copy, distribute and/or modify
%   this document under the terms of the GNU Free
%   Documentation License, Version 1.3 or any later version
%   published by the Free Software Foundation; with no
%   Invariant Sections, no Front-Cover Texts, and no
%   Back-Cover Texts. A copy of the license is included in
%   the section entitled ``GNU Free Documentation
%   License''.
% \end{quote}
% \bigskip
%
% If you have Invariant Sections, Front-Cover Texts and
% Back-Cover Texts, replace the ``with \dots\ Texts.''\ line
% with this:
%
% \bigskip
% \begin{quote}
%   with the Invariant Sections being LIST THEIR TITLES,
%   with the Front-Cover Texts being LIST, and with the
%   Back-Cover Texts being LIST.
% \end{quote}
% \bigskip
%
% If you have Invariant Sections without Cover Texts, or
% some other combination of the three, merge those two
% alternatives to suit the situation.
%
% If your document contains nontrivial examples of program
% code, we recommend releasing these examples in parallel
% under your choice of free software license, such as the
% GNU General Public License, to permit their use in free
% software.