In particular, he was the first to investigate the notion of "discharging", which turned out to be a fundamental ingredient of the eventual computer-aided proof by Kenneth Appel and Wolfgang Haken.
John Kenneth Galbraith | Jacob M. Appel | Kenneth Branagh | Kenneth McClintock | Kenneth Grahame | Kenneth Cole | Kenneth Burke | Kenneth "Babyface" Edmonds | Jacob Appel | Kenneth Williams | Kenneth Noland | Kenneth Clarke | Kenneth T. Jackson | Kenneth Rexroth | Kenneth Hayne | Kenneth Cranham | Kenneth Cole Productions | Kenneth Cockrel, Jr. | Kenneth Anger | Karel Appel | Kenneth Tynan | Kenneth Kaunda | Kenneth Baker, Baron Baker of Dorking | Kenneth Armitage | Kenneth More | Kenneth Goldsmith | Kenneth Frampton | Kenneth Fisher | Kenneth Connor | Kenneth Rogoff |
In early June he was admitted involuntarily to the Philadelphia Institute of Pennsylvania Hospital, a prestigious mental hospital, where his psychiatrist was Dr. Kenneth Appel.