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% $Header$

% Copyright 2004 by Till Tantau <tantau@users.sourceforge.net>.
% This file can be redistributed and/or modified under
% the terms of the GNU Public License, version 2.



\title{There Is No Largest Prime Number}
\subtitle{With an introduction to a new proof technique}

\author[Euklid]{Euklid of Alexandria}
\institute[Univ. Alexandria]{Department of Mathematics\\ University of Alexandria}
\date[ISPN '80]{27th International Symposium on Prime Numbers, --280}



\subsection{Proof of the Main Theorem}

  \frametitle{There Is No Largest Prime Number}
  \framesubtitle{The proof uses \textit{reductio ad absurdum}.}

    There is no largest prime number.
      % The strange way of typesetting math is to minimize font usage
      % in order to keep the file sizes of the examples small.
    \item<1-| alert@1> Suppose $p$ were the largest prime number.
    \item<2-> Let $q$ be the product of the first $p$ numbers.
    \item<3-> Then $q$\;+\,$1$ is not divisible by any of them.
    \item<1-> Thus $q$\;+\,$1$ is also prime and greater than $p$.\qedhere