\usepackage{color} \usepackage{graphicx}
\begin{figure}[htbp] \begin{center} \input{lec1-ring.pstex_t} \caption{Constructing the two sequences.} \label{lec1:fig:ring} \end{center}Note that the file with the extension "pstex_t" is the one which is included. This file includes the "pstex" file in its body.