A quick start for LaTeX beginners

latex-quick-start.tex

\documentclass[letterpaper, 11pt]{article}

\usepackage{amsmath}

\title{This is the title of this document.}
\author{Changhyun Kwon}
\date{October 31, 2014}


\begin{document}
\maketitle

\begin{abstract}
Here is an abstract
\end{abstract}


\section{Introduction} \label{sec:intro}

Hello, World. Blah blah blah. You can cross-reference Section \ref{sec:intro} or Section \ref{sec:analysis}. 

You can write an equation:
\begin{equation}
\sum_{i=1}^n x_{ij} = 1 \quad \forall j \in J \label{sum_x}
\end{equation}
and you can also cross-reference equation \eqref{sum_x}.


\section{Analysis} \label{sec:analysis}

...

\section{Conclusion} \label{sec:conclusion}

...

\end{document}