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Viewing Preamble for Szemer\'edi's theorem

[ back to 'Szemer\'edi's theorem' ]

\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}

\makeatletter
%\@ifundefined{url}{\usepackage{url}}{}
\@ifundefined{bibname}{}{\renewcommand{\bibname}{References}}
\makeatother