Mathematician:Percy John Heawood

Mathematician
English mathematician who devoted his working life to the Four Color Theorem.

In $1890$, exposed a flaw in 's proof, that had been considered as valid for $11$ years.

He never actually proved the theorem, which remained open until it was finally proved in $1976$ by and.

Nationality
English

History

 * Born: 8 September 1861 in Newport, Shropshire, England
 * Died: 24 January 1955 in Durham, Co. Durham, England

Theorems and Definitions

 * Five Color Theorem, also known as Heawood's Theorem
 * Heawood's Algorithm
 * Heawood Conjecture

Publications

 * 1890: Map colour theorems
 * 1949: Map colour theorems