+% Define a new ``partsecframe'' environment that uses a default frame
+% title of ``<part>: <section>'' when no other frame title is given.
+\newenvironment{partsecframe}[1][%
+ \ifx\insertpart\@empty%
+ \else%
+ \insertpart: %
+ \fi%
+ \insertsectionhead%
+]
+ {\begin{frame}{#1}}
+ {\end{frame}}
+
+% Define a new ``refsframe'' environment for the bibliography.
+% It automatically handles the frame breaks, and fixes the busted
+% vertical spacing on slides >= 2. The extra curly braces ensure that
+% the change to the ``frametitle continuation'' template are only
+% temporary.
+\newenvironment{refsframe}[1][References] {
+ \splittopskip=2.13em % Fixes the vertical spacing of split frames.
+ \setbeamertemplate{frametitle continuation}{} % Same title for all frames.
+ \begin{frame}[allowframebreaks]{#1}
+ }
+ { \end{frame} }
+
+