I got an error with the exampleblock environment:
\documentclass{beamer}
\usetheme{PaloAlto}
\begin{document}
\begin{frame}\frametitle{Title}
\begin{exampleblock}
\[
t = \frac{1}{\lambda}\mbox{ln}\left(\frac{N(t)-D(t)}{N(t)}\right)
\]
\end{exampleblock}
\end{frame}
\end{document}
Latex says "exempleblock environment undefined." Where is the problem?
All blocks environments need a title, so the syntax
\begin{exempleblock}
stuff
\end{exempleblock}
is wrong. To fix the problem use:
\begin{exempleblock}{Title}
stuff
\end{exempleblock}
or at least:
\begin{exempleblock}{}
stuff
\end{exempleblock}
So your example is:
\documentclass{beamer}
\usepackage{lmodern} % to remove warnings of size substitution
\usetheme{PaloAlto}
\begin{document}
\begin{frame}\frametitle{My equation}
\begin{exampleblock}{title}
[
t = \frac{1}{\lambda}\mbox{ln}\left(\frac{N(t)-D(t)}{N(t)}\right)
]
\end{exampleblock}
\end{frame}
\end{document}
which produces:
I'm sure we already had a similar question, but I cannot find it now.
exampleblockand it's missing a second argument: it wants to be invoked as\begin{exampleblock}{title}. See beamer guide. – bloodworks Jan 19 '13 at 09:36