\documentclass{beamer} 
\usetheme{Boadilla}
% removes navigation symbols
\setbeamertemplate{navigation symbols}{}
\pretolerance=10000 %disables hyphenation

\usepackage{amssymb, amsmath,amsthm,amsxtra}
\usepackage{color}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage[capitalize,noabbrev]{cleveref}
\crefformat{equation}{(#2#1#3)} % removes eq.~


\newcommand{\tofill}[1]{{\color{green} #1}}
\newcommand{\instructions}[1]{{\color{blue} #1}}
% \renewcommand{\instructions}[1]{} %% hides instructions

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\title[Short Title]{Full Title}
\author[Short form author]{Full Author}
\institute[OHIO]{Department of Mathematics\\
   \includegraphics[width=0.3\textwidth]{OHIOCLR}
}

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\begin{document}
\begin{frame}[plain]
  \titlepage
\end{frame}

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\begin{frame}{Abstract}
For guidance on writing abstracts, see \url{http://sepwww.stanford.edu/sep/prof/abscrut.html}.
\vfill

{\large

  abstract text


}\vfill

\end{frame}
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\begin{frame}{Outline}
  \tableofcontents
\end{frame}
\section{Introduction}
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\begin{frame}{Introduction}
For guidance on writing introductions (mainly for papers), see
\url{http://sepwww.stanford.edu/sep/prof/Intro.html}.
\vfill
introduction text

\end{frame}
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\section{Section header}
\subsection{subsection header}
% the fragile option is needed when code is included
\begin{frame}[fragile]{slide title}

\vfill

\vfill
\end{frame}
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\subsection{another subsection}
\begin{frame}[fragile]{another slide}
\vfill

Here is how to include graphics objects, such as .pdf files. For more information see
\url{https://en.wikibooks.org/wiki/LaTeX/Importing_Graphics}
\begin{center}
\includegraphics[width=0.4\textwidth]{OHIOCLR}
\end{center}

\vfill
\end{frame}
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\begin{frame}[fragile]{another slide}
xxx
\end{frame}
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\section{Conclusions} 
\begin{frame}{Conclusions and Comments}
\vfill
  \begin{itemize}
  \item
  \item
    \end{itemize}
  \vfill

\end{frame}
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\begin{frame}{References}
\vfill
Cite like \cite{refkey} or \cite{refkey,refkey2}.

{\small
\begin{thebibliography}{18}

\bibitem[in-text ref]{refkey}
Authors
\newblock Title
\newblock Publisher, year, pages, etc.
\newblock \url{url}

\bibitem[in-text ref2]{refkey2}
Authors2
\newblock Title2
\newblock Publisher2, year2, pages2, etc.2
\newblock \url{url2}
\end{thebibliography}
}
\end{frame}
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\end{document}
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