% LESSON THIRTEEN
          
\documentclass{amsart}
\usepackage{graphicx} % Allows us access to graphics package.
\thispagestyle{empty}
\begin{document}
             
\begin{center}
	\textbf{Lesson Thirteen: Importing Graphics}
\end{center}  

The easiest type of graphics file to import into \LaTeX\ is 
the Encapsulated PostScript (EPS) format. Below is a graph 
that was created using the software package Maple{\textregistered} 
and then exported as an \verb!.eps! file.

\begin{figure}[h] 
% As in the table enviroment, [h] means put the figure 'here.'
\begin{center}
\scalebox{.4}{\includegraphics{tangentgraph.eps}}
% The factor in \scalebox is used to shrink or enlarge your figure.
\caption{A graph of the tangent function.}
\end{center} 
\end{figure}

If you take a course on graph theory, you'll learn that
an Eulerian circuit is one that uses each graph edge exactly 
once. You'll also prove that a graph has such a circuit if 
and only if no graph vertex has odd degree. Does the graph 
below have an Eulerian circuit? If so, can you find one?

\begin{figure}[h] 
\begin{center}
\scalebox{.5}{\includegraphics{euleriangraph.eps}}
\caption{A graph of airport connections.}
\end{center} 
\end{figure}
\end{document}