\documentclass[11pt,a4paper]{article}

\usepackage{pstricks,pst-node,pst-tree,multido}
\usepackage{amsmath,amstext,amsthm,amsfonts,latexsym,bm}
\usepackage[dvips]{graphicx}
\usepackage[brazil]{babel}
\usepackage[latin1]{inputenc}
\usepackage{epsfig}

\begin{document}

\title{    }

\author{    }

\date{    }

\maketitle

\thispagestyle{empty}

\begin{abstract}

\end{abstract}

\end{document}