Subject: Re: Four Color Maps<br/>
Date: Dec 07, 2003 @ 20:03<br/>
Author: Eric Choate (&quot;Eric Choate&quot; &lt;choatune@...&gt;)<br/>
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<div id="ygrps-yiv-1753742082"><blockquote><span title="ireply">&gt;Maps on the surfaces of some bizarre three-dimensional geometric <br/>
 </span></blockquote>shapes have been shown to require more colors.<br/>
<br/>
If I were to ever write a sci-fi novel, it will definitely have a <br/>
planet shaped like a Klein bottle. It can require six colors even <br/>
each country is simply connected.</div>