| Percy Heawood | |
 |
|
| Born | September 8, 1861 Newport, Shropshire, England |
|---|---|
| Died | January 24, 1955 (aged 93) Durham, Co. Durham, England |
Percy John Heawood (8 September 1861 Newport, Shropshire, England [1] - 24 January 1955 Durham, England [2]) was a British mathematician. Events 70 - Roman forces under Titus sack Jerusalem. 1264 - The Statute of Kalisz Year 1861 ( MDCCCLXI) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Common Newport is a Market town in the borough of Telford and Wrekin and ceremonial county of Shropshire, England, some north of England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland Events 41 - Gaius Caesar (Caligula, known for his eccentricity and cruel Despotism, is Assassinated by his disgruntled Year 1955 ( MCMLV) was a Common year starting on Saturday (link displays the 1955 Gregorian calendar) Durham (ˈdʌrəm in RP, locally ˈdʏrəm is a small city and main settlement of the City of Durham district of County Durham, England England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland Events 70 - Roman forces under Titus sack Jerusalem. 1264 - The Statute of Kalisz Year 1861 ( MDCCCLXI) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Common Newport is a Market town in the borough of Telford and Wrekin and ceremonial county of Shropshire, England, some north of England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland Events 41 - Gaius Caesar (Caligula, known for his eccentricity and cruel Despotism, is Assassinated by his disgruntled Year 1955 ( MCMLV) was a Common year starting on Saturday (link displays the 1955 Gregorian calendar) Durham (ˈdʌrəm in RP, locally ˈdʏrəm is a small city and main settlement of the City of Durham district of County Durham, England England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland He devoted essentially his whole working life to the four colour theorem and in 1890 he exposed a flaw in Alfred Kempe's proof, that had been considered as valid for 11 years. The four color theorem (also known as the four color map theorem) states that given any plane separated into regions such as a political map of the states of a country Sir Alfred Bray Kempe DCL FRS (6 July 1849 Kensington, London – 21 April 1922 London) was a Mathematician With the four colour theorem being open again he established the five colour theorem instead. The five color theorem is a result from Graph theory that given a plane separated into regions such as a political map of the counties of a state the regions may be colored The four colour theorem itself was finally established by a computer-based proof in 1976. The four color theorem (also known as the four color map theorem) states that given any plane separated into regions such as a political map of the states of a country
See also
References
- ^ Times obituary
- ^ GRO Register of Deaths: MAR 1955 1a 338 DURHAM C. The Heawood conjecture or Ringel–Youngs theorem in Graph theory gives an Upper bound for the number of colors which are Sufficient for In Mathematics, the Heawood number of a Surface is a certain Upper bound for the maximal number of colors needed to color any graph embedded In the mathematical field of Graph theory, the Heawood graph is an Undirected graph with 14 vertices and 21 edges The four color theorem (also known as the four color map theorem) states that given any plane separated into regions such as a political map of the states of a country The five color theorem is a result from Graph theory that given a plane separated into regions such as a political map of the counties of a state the regions may be colored - Percy J. Heawood
External links
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic