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\title{ \LaTeX tutorial}
 \author{Arpit Gupta \\ \small{JHU}}
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\begin{abstract}
Learning \LaTeX.
\end{abstract}
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\section{Introduction}\label{sec_1}
 
Footnotes are at the bottom of the page.\footnote{Footnote}

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\includegraphics{fig1.eps}
\label{Fig_1}
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\section{Theory}\label{sec_2}

Introduction was in Section \ref{sec_1} % on page~\pageref{sec_1} \\

Second footnote\footnote{Foot}\\

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\begin{tabular}{c r @{.} l}
Pi expression &
\multicolumn{2}{c}{Value} \\
\hline
$\pi$ & 3&1416 \\
$\pi^{\pi}$ & 36&46 \\
$(\pi^{\pi})^{\pi}$ & 80662&7 \\
\end{tabular}

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\section{Discussion}
Theory was already discussed in Section \ref{sec_2} on page~\pageref{sec_2}\\

\begin{tabular}{|l|r|}
\hline
7C0 & hexadecimal \\
3700 & octal \\ 
\cline{2-2}
11111000000 & binary \\
\hline \hline
1984 & decimal \\
\hline
\end{tabular}
\\
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\section{Conclusions}

 To get a better understanding, read \cite{ref_1}.\\
Also, take a look at \cite{ref_2} posted on wiki. 

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\begin{thebibliography}{10}
\bibitem{ref_1}L. Lamport:\emph{\LaTeX}, A Document Preparation System (1994)
\bibitem{ref_2}Presentation 
\end{thebibliography}


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