minimal example (needs pdffile.pdf)

example.latex (text/plain), 219 bytes, created by Raimar Sandner on 2010-01-31 20:04:10 UTC

\documentclass{article}
\usepackage{graphicx}

\begin{document}

\begin{figure}[t]
  \begin{center}
    \includegraphics[width=8cm]{pdffile}
  \end{center}
  \caption{Domain of integration}
\end{figure}

\end{document}