Fire-farve Sætningen

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Fire-farve Sætningen JB Oversigt Historie Kort og Grafer Bevis ide Kempekæder Beviserne Afladning Forbedringer og generaliseringer Andre overflader Referencer Oversigt Historie Kort, grafer og farvninger Plane grafer og Eulers formel Reducerbare konfigurationer Kempekæder Afladning og uundg˚aelige konfigurationer Beviserne Kort p˚a andre overflader Generaliseringer
Fire-farve Sætningen JB Oversigt Historie Kort og Grafer Bevis ide Kempekæder Beviserne Afladning Forbedringer og generaliseringer Andre overflader Referencer Historie 1852 Francis Guthrie formulerede problemet 1879 Alfred Bay Kempe publicerede et bevis 1890 Percy John Heawood fandt en fejl i beviset 1913 George David Birkhoff indførte reducerbarhed 1969 Heinrich Heesch indførte afladning 1976 Appel & Haken gav det første bevis 1996 Robertson et. al. gav et bedre bevis 2004 Gonthier: Formaliseret computer-checked bevis
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Fire-farve Sætningen

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