Kenneth Appel, Date of Birth, Place of Birth, Date of Death

Kenneth Appel

American mathematician

Date of Birth: 08-Oct-1932

Place of Birth: Brooklyn, New York, United States

Date of Death: 19-Apr-2013

Profession: mathematician, university teacher

Nationality: United States

Zodiac Sign: Libra

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.