# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/kenneth-appel
# Generated: 2026-08-13T03:47:50.188Z

schema: https://schema.org/Person
url: "https://fame.am/person/kenneth-appel"
name: "Kenneth Appel"
slug: "kenneth-appel"
description: "Kenneth Ira Appel was an American mathematician who in 1976, with colleague Wolfgang Haken at the University of Illinois at Urbana–Champaign, solved the four-color theorem, one of the most famous problems in mathematics. 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. The proof was controversial because it depended on thousands of computer calculations that could not be double-checked by hand, the first prominent example of such a process."
tagline: "American mathematician"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Kenneth_appel_1970.jpg?width=1200"
gender: "male"
country:
  name: "United States"
  isoCode: "US"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1932-10-08"
deathDate: "2013-04-19"
livingStatus: "DECEASED"
scores:
  popularity:           50.91
  momentum:             16.92401960784314
  historical:           16.435028
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "BREAKOUT"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://zh.wikipedia.org/wiki/%E5%87%B1%E5%B0%BC%E6%96%AF%C2%B7%E9%98%BF%E4%BD%A9%E7%88%BE"
    title: "凱尼斯·阿佩爾"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%83%D9%8A%D9%86%D9%8A%D8%AB_%D8%A3%D8%A8%D9%8A%D9%84"
    title: "كينيث أبيل"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%83%D9%8A%D9%86%D9%8A%D8%AB_%D8%A7%D8%A8%D9%8A%D9%84"
    title: "كينيث ابيل"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://ht.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://ko.wikipedia.org/wiki/%EC%BC%80%EB%84%A4%EC%8A%A4_%EC%95%84%ED%8E%A0"
    title: "케네스 아펠"
    type:  "WIKIPEDIA"
  - url: "https://nl.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://sk.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://sv.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AF%86%E0%AE%A9%E0%AF%8D%E0%AE%A9%E0%AE%A4%E0%AF%8D_%E0%AE%85%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AF%86%E0%AE%B2%E0%AF%8D"
    title: "கென்னத் அப்பெல்"
    type:  "WIKIPEDIA"
  - url: "https://vo.wikipedia.org/wiki/Kenneth_Appel"
    title: "Kenneth Appel"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q224787"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump