The applet below was developed for Todd Drumm and Jonathan Poritz during their
visit to the Geometry Center.  It is a visualization of their research into
hyperbolic groups and so-called Ford domains.  <p>

The colored circles represent the Ford domains, with brighter colors being 
higher powers of the cyclic group.  <p>

Mouse controls:  <p>

<ul>
<li>Parameter window (left)
    <ul>
    <li>left button -> select parameter
    <li>middle button -> translate viewport
    <li>right button -> zoom in/out
    </ul>
<li>Visualization window (right)
    <ul>
    <li>left button -> translate viewport
    <li>middle button -> center viewport on clicked point
    <li>right button -> zoom in/out
    </ul>
</ul>

<b>WARNING:</b> this applet dies quite well in Netscape, because Netscape is
broken in many ways.

<applet code=FordApplet codebase=classes width=700 height=500>
</applet>