[Tex/LaTex] Undefined control sequence.\end{frame}

beamer

\documentclass[9pt]{beamer}
\usepackage{beamerthemeWarsaw}
\renewcommand\textbullet{\ensuremath{\bullet}}
\useoutertheme{shadow}
\useinnertheme{circles}
\usepackage[utf8]{inputenc}
%%\usecolortheme{seagull}

\title[monExemple]{Un exemple sur le Beamer}
\subtitle{created with beamer 3.x}
\author[bela]{A.belahcene}
\institute{ IAP, Boumerdes}


\setbeamertemplate{itemise item }[ball]
\setbeamercolor{block title}{fg=black,bg=blue}
\setbeamercolor{block body}{fg=black,bg=blue!50}
\setbeamercolor{block body alerted}{fg=white,bg=red}


\begin{document}    





\subsection{Pluridesciplanirité }
 % ------------------------------------------------------------
\begin{frame}
\frametitle{Quelque disciplines d'EIAH}
\begin{itemize}
\item Pédagogie .
    \pause
   \item Didactique .
\pause
\item Information et communication .
\pause
\item informatique 
\subitem IHM , IA ,Si
\end{itemize}
\end{frame}
\end{document}

Best Answer

As various comments already stated: To create subitems in beamer, simply nest the itemize environments.

A few other remarks:

  • instead of \usepackage{beamerthemeWarsaw} use \usetheme{Warsaw} (this is the more beamerish way to load a theme)
  • you don't need \useoutertheme{shadow}, this is already included in the Warsaw theme
  • with \begin{itemize}[<+->] you don't need to manually put a \pause after each item.
\documentclass[9pt]{beamer}

\usetheme{Warsaw}
\useinnertheme{circles}
\usepackage[utf8]{inputenc}

\title[monExemple]{Un exemple sur le Beamer}
\subtitle{created with beamer 3.x}
\author[bela]{A.belahcene}
\institute{ IAP, Boumerdes}

\setbeamertemplate{itemise item }[ball]
\setbeamercolor{block title}{fg=black,bg=blue}
\setbeamercolor{block body}{fg=black,bg=blue!50}
\setbeamercolor{block body alerted}{fg=white,bg=red}

\begin{document}   

\subsection{Pluridesciplanirité }

\begin{frame}
    \frametitle{Quelque disciplines d'EIAH}
    \begin{itemize}[<+->]
        \item Pédagogie .
        \item Didactique .
        \item Information et communication .
        \item informatique 
        \begin{itemize}
            \item IHM , IA ,Si
        \end{itemize}
    \end{itemize}
\end{frame}

\end{document}
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