How to Pronounce Kenneth Appel
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Oct 08, 1932 Brooklyn, New York, United States Died on 19 Apr 2013 (aged 80)
American mathematician
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About Kenneth Appel
- Kenneth Ira Appel (October 8, 1932 – April 19, 2013) was an American mathematician who in 1976, with colleague Wolfgang Haken at the University of Illinois at Urbana–Champaign, solved one of the most famous problems in mathematics, the four-color theorem.
- They proved that any two-dimensional map, with certain limitations, can be filled in with four colors without any adjacent "countries" sharing the same color.
