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Subject Item
dbpedia:Kenneth_Appel
rdfs:comment
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.
foaf:name
Appel, Kenneth Kenneth Ira Appel
dc:description
Americanmathematician
dbpedia-owl:almaMater
dbpedia:Doctor_of_Philosophy dbpedia:Bachelor_of_Science
dbpedia-owl:award
dbpedia:Fulkerson_Prize
dbpedia-owl:birthDate
1932-10-08Z
dbpedia-owl:birthPlace
dbpedia:Brooklyn dbpedia:New_York
dbpedia-owl:birthYear
1932-01-01Z
dbpedia-owl:citizenship
dbpedia:United_States
dbpedia-owl:deathDate
2013-04-19Z
dbpedia-owl:deathPlace
n4:_New_Hampshire dbpedia:Dover dbpedia:Delaware
dbpedia-owl:deathYear
2013-01-01Z
dbpedia-owl:doctoralAdvisor
dbpedia:Roger_Lyndon
dbpedia-owl:field
dbpedia:Combinatorics dbpedia:Topology dbpedia:Graph_theory
dbpedia-owl:knownFor
dbpedia:Four_color_theorem
dbpedia-owl:residence
dbpedia:New_Hampshire