\documentclass{beamer}
\usetheme[compactlogo,white]{Madison}
\usefonttheme[onlymath]{serif}
\usepackage{amsmath}
\usepackage{amssymb,amsfonts,amsthm}
\usepackage{graphicx}
\graphicspath{{figs/}}
\usepackage{natbib}
\title{A Cool Title}
\subtitle{a clever subtitle}
\author{First A.\ Author and Second B. Author}
\date[]{
\\
Workshop on
\emph{Various Mathematical Things}\\
Cool Institute, Somewhere (Online)\\
1 January 2098
}
\begin{document}
\small
\begin{frame}[plain]
\maketitle
\end{frame}
\begin{frame}{A slide}
\begin{center}
\includegraphics[width=.5\textwidth]{decay_corr_sketch}
\end{center}
\begin{enumerate}[<+->]
\item Item 1
\item Item 2 and a citation \cite{Thurston1988}.
\end{enumerate}
\end{frame}
\bibliographystyle{plainnat}
\begin{frame}[t,allowframebreaks]
\frametitle{References}
\bibliography{main}
\end{frame}
\end{document}
