Heawood is a surname. Notable people with the surname include: *

Jonathan Heawood Jonathan Heawood is an English journalist and literary editor. He is Executive Director of thPublic Interest News Foundation the first journalism charity in the UK to be awarded charitable status. Heawood is the founder and former CEO of IMP ...

, British journalist *

Percy John Heawood Percy John Heawood (8 September 1861 – 24 January 1955) was a British mathematician, who concentrated on graph colouring. Life He was the son of the Rev. John Richard Heawood of Newport, Shropshire, and his wife Emily Heath, daughter of the ...

(1861–1955), British mathematician **

Heawood conjecture In graph theory, the Heawood conjecture or Ringel–Youngs theorem gives a lower bound for the number of colors that are necessary for graph coloring on a surface of a given genus. For surfaces of genus 0, 1, 2, 3, 4, 5, 6, 7, ..., the required ...

Heawood graph Heawood is a surname. Notable people with the surname include: *Jonathan Heawood, British journalist *Percy John Heawood (1861–1955), British mathematician **Heawood conjecture **Heawood graph **Heawood number In mathematics, the Heawood number ...

Heawood number In mathematics, the Heawood number of a surface is an upper bound for the number of colors that suffice to color any graph embedded in the surface. In 1890 Heawood proved for all surfaces ''except'' the sphere that no more than : H(S)=\left\lflo ...

See also