# Case distinction in a proof using beamer

I have the following problem: For a proof of a theorem I need a case distinction inside a proof environment of a beamer presentation. I think that an enumerate might be helpful, the problem is however that I want some enumitems other than (a),(b),(c). I tried to set this using \setbeamertemplate:

\documentclass{beamer}
\usetheme{Goettingen}

\setbeamertemplate{enumerate item}{\arabic{enumi}. Fall:}

\begin{document}
\begin{frame}
\begin{enumerate}
\item asd
\end{enumerate}
\end{frame}

\end{document}


Unfortunately, the whole thing looks really crappy, because the enumitem is right justified and there is not enough space to accommodate this longer string. Does anyone have any ideas on how to fix this, or how to make a nice-looking case distinction for a beamer document?

-

One option could be to use a slightly modified description environment and an auxiliary counter; something along these lines:

\documentclass{beamer}
\usetheme{Goettingen}

\newcounter{count}
\newcommand\mycount{\stepcounter{count}\thecount. }
\resetcounteronoverlays{count}

\setbeamersize{description width=2.5cm}
\setbeamertemplate{description item}{\mycount\insertdescriptionitem}

\begin{document}
\begin{frame}
\begin{description}
\item[Winter:] asd
\item[Spring:] asd
\item[Summer:] asd
\item[Fall:] asd
\end{description}
\end{frame}

\end{document}


Or, with left alignment for the labels:

\documentclass{beamer}
\usetheme{Goettingen}

\newcounter{count}
\newcommand\mycount{\stepcounter{count}\thecount. }
\resetcounteronoverlays{count}

\setbeamersize{description width=2.5cm}
\setbeamertemplate{description item}{%
\makebox[2cm][l]{\mycount\insertdescriptionitem\hfill}}

\begin{document}
\begin{frame}
\begin{description}
\item[Winter:] asd
\item[Spring:] asd
\item[Summer:] asd
\item[Fall:] asd
\end{description}
\end{frame}

\end{document}


-
Thank you, this seems to work quite nicely. On a different subject, the word Fall in this context is german for case and has nothing to do with seasons :) –  hfhc2 Jun 8 '12 at 6:01
@hfhc2 sorry about the misunderstanding ;-) My German knowledge reduces to a few words (and Fall was not one of them); on the bright side, now I can add a new word to my list. –  Gonzalo Medina Jun 8 '12 at 16:08