Kenneth Appel
American mathematician
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Kenneth Ira Appel 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. Wikipedia
Born: October 8, 1932, Brooklyn, New York, NY
Died: April 19, 2013 (age 80 years), Dover, NH
Children: Andrew Appel, Laurel F. Appel, and Peter H. Appel
Education: University of Michigan (1955–1959) and Queens College, City University of New York (1953)
