[Tex/LaTex] How to include greek symbols in a beamer presentation

beamergreek

I can't seem to insert Greek symbols in my beamer presentation. This is how the top section looks like

\documentclass{beamer}
\setbeamertemplate{navigation symbols}{}
\usepackage{beamerthemeshadow}
\usepackage{ragged2e}
\usepackage{amsmath, amsthm}
\newtheorem{exercise}[theorem]{Exercise}
\newcommand{\exinline}[1]{(\refstepcounter{theorem}Exercise~\thetheorem\label{#1})}
\usepackage{listings}%% to include code
\lstset{
    language=Java, basicstyle=\footnotesize\ttfamily,
    keywordstyle=\footnotesize\color{blue}\ttfamily,
 }

\addtobeamertemplate{block begin}{}{\justifying}
\setbeamercovered{transparent=15}
\begin{document}
%here is a sample page
\begin{frame}
   \frametitle{Trial insert Greek Symbols}
     \begin{itemize}
        \item<1> \epsilon
        \item<2> Some text
     \end{itemize}
   \end{frame}
\end{document}

Whenever I remove the \epsilon, my file compiles without error. When I add the \epsilon it produces this error
"!Missing $ inserted. ,inserted text> $ \end{frame}"
Also is there any specific arrangements when including a package in the latex file (E.g. A certain package should be above some other package while including in a file).

Regards

Best Answer

Either you put your \epsilon in math mode ($\epsilon$) or you use a package such as textgreek and its \textepsilon.

(Last option would be using a unicode-capable engine like Xe/LuaLaTeX and inserting the unicode character).

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