

\documentclass[compress,greek]{beamer}
\mode<presentation>
{
%\usetheme{default}\usecolortheme{beaver}%\useoutertheme{default}
%\usetheme{PaloAlto}
  \usetheme{Warsaw} %<-- Well known blue theme
% \usetheme{Berlin}
%\usecolortheme{seahorse}
%\usecolortheme{rose}
%\usetheme{Berkeley}
%\usetheme{boxes}
%\usetheme{Antibes}
% \usetheme{Bergen}
%\usetheme{CambridgeUS} %<-- Simpler themes I like
% \usetheme{Copenhagen}
% \usetheme{Darmstadt}
% \usetheme{Dresden}
% \usetheme{Frankfurt}
% \usetheme{Goettingen} %<-- Simpler themes I like
% \usetheme{Hannover}
% \usetheme{Ilmenau}
% \usetheme{JuanLesPins}
% \usetheme{Luebeck}
% \usetheme{Madrid}
% \usetheme{Malmoe}
% \usetheme{Marburg} %<-- Simpler themes I like
% \usetheme{Montpellier}
% \usetheme{Pittsburgh}
% \usetheme{Rochester}
% \usetheme{Singapore} %<-- Simpler themes I like
% \usetheme{Szeged}
%\usetheme{Boadilla}
%\usetheme{AnnArbor}

%%% remove beamer's navigation bar!! %%%%%%
% \setbeamertemplate{navigation symbols}{} %% 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%% Comment to completely cover next transparencies %%
%\setbeamercovered{transparent} %%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
}


\usepackage{babel}
\usepackage[iso-8859-7]{inputenc}

%%% FONT SELECTION %%%%%%%%%%%%%%%%%%%%%%
%%% we choose a sans font %%%%%%%%%%%%%%%
%\usepackage{kmath,kerkis} %%%%%%%%%%%%%%
\let\textlozenge=\undefined
\usepackage[default]{gfsneohellenic} %%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\title[Σύντομος τίτλος]{Η ομιλία μου: Γενικός Τίτλος}

%\subtitle{Include Only If Paper Has a Subtitle}

\author[Α.\ Τσολομύτης] % (optional, use only with lots of authors)
{Αντώνης Τσολομύτης}

\institute[Πανεπιστήμιο Αιγαίου] % (optional, but mostly needed)
{
  Τμήμα Μαθηματικών\\
  Πανεπιστήμιο Αιγαίου\\[4ex]
κοινή εργασία με τους Συνεργάτης 1 και Συνεργάτης 2. 
}

\date{Ιούνιος, \textsc{2009}}

%\subject{}

\usepackage{hyperref}
\usepackage{amsfonts,amssymb,wasysym}
\usepackage[accumulated]{beamerseminar}
\usepackage{beamertexpower}

\makeatletter
\newcommand{\arccot}{\mathop{\operator@font arccot}}
\makeatother


\begin{document}

\begin{frame}
\titlepage
\end{frame}



%\section{}




\begin{frame}
 \frametitle{Συμβολισμός}

Κάθε σελίδα είναι ένα \textlatin{frame}. Παύση μέσα σε κάθε \textlatin{frame}
γίνεται με την εντολή \latintext\textbackslash{}pause\greektext
\pause
\begin{equation*}
\arccot 0=\pause\pi/2.
\end{equation*}



\pause

Θεωρούμε\ldots
\end{frame}


\begin{frame}
\frametitle{Το κύριο θεώρημα}
\begin{theorem} Ισχύει
\end{theorem}
\end{frame}



\end{document}
