About Kenneth Appel
Lived 1932 – 2013 (aged 80). Kenneth Appel was an American mathematician and university teacher, known for Four-color theorem.
Group theory
Kenneth Appel's other publications include an article with P.E. Schupp titled Artin Groups and Infinite Coxeter Groups. In this article Appel and Schupp introduced four theorems that are true about Coxeter groups and then proved them to be true for Artin groups. The proofs of these four theorems used the "results and methods of small cancellation theory."
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Frequently asked questions
Who was Kenneth Appel?
American mathematician
When was Kenneth Appel born?
Kenneth Appel was born on 8 October 1932 in Brooklyn.
When did Kenneth Appel die?
Kenneth Appel died on 19 April 2013 in Dover.
What was Kenneth Appel's occupation?
Kenneth Appel was a mathematician and university teacher.
What was Kenneth Appel known for?
Kenneth Appel was known for Four-color theorem.
What nationality was Kenneth Appel?
Kenneth Appel was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Kenneth Appel. https://biography.guide/kenneth-appel/
MLA: "Kenneth Appel." Biography.guide, https://biography.guide/kenneth-appel/.
Chicago: "Kenneth Appel." Biography.guide. https://biography.guide/kenneth-appel/.
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