Re: Help

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#85

From: Steve Waldo
Date: Tue, 10 Jun 1997 00:00

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From "Graph Theory" by Ronald Gould

First paragraph of Section 8.5  The Four Color Theorem

"The idea of coloring can be traced to Francis Guthrie. In 1852, while he
was a student of Augustus De Morgan, Guthrie asked De Morgan to verify the
"fact" that any map (consider it a map of countries if you wish) drawn in
the plane could be colored with at most four colors, so that adjacent (that
is, sharing a boundary) countries received different colors. De Morgan
responded by saying he did not know that this was a "fact," and he
proceeded to ask other mathematicians (like Hamilton) about this problem.
Both Guthrie and De Morgan believed this statement was indeed a fact, yet
neither could verify it."

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From: "Steve Waldo" <waldos@bitstream.net>
Subject: Re: Help
Date: 1997/06/10
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