This informal introduction by Jim Loy to the four color theorem is designed specifically for a general, non-technical audience. Using simple language, examples and images, Loy explains the theorem and how it was proven by researchers. The author also briefly shows how the theorem became a part of the graph theory by displaying a map than the equivalent graph.
%0 Electronic Source %A Loy, Jim %D January 1, 1999 %T Four Color Theorem Intro %V 2015 %N 4 May 2015 %8 January 1, 1999 %9 text/html %U http://www.jimloy.com/geometry/4color.htm
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