Phyllis Nicolson was a British

British people

The British are citizens of the United Kingdom, of the Isle of Man, any of the Channel Islands, or of any of the British overseas territories, and their descendants...

 mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

 most known for her work on the Crank–Nicolson scheme together with John Crank

John Crank

John Crank was a mathematical physicist, best known for his work on the numerical solution of partial differential equations....

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She was born Phyllis Lockett in Macclesfield

Macclesfield

Macclesfield is a market town within the unitary authority of Cheshire East, the county palatine of Chester, also known as the ceremonial county of Cheshire, England. The population of the Macclesfield urban sub-area at the time of the 2001 census was 50,688...

 and went to Stockport High School for Girls. She graduated from Manchester University with a B.Sc. in 1938, M.Sc. in 1939 and a Ph.D. in Physics in 1946. She was a research student from 1945-46 and research fellow from 1946-49 at Girton College, Cambridge

Girton College, Cambridge

Girton College is one of the 31 constituent colleges of the University of Cambridge. It was England's first residential women's college, established in 1869 by Emily Davies and Barbara Bodichon. The full college status was only received in 1948 and marked the official admittance of women to the...

. She married Malcolm Nicolson, also a physicist, in 1942; after his accidental death in 1951 she married Malcolm McCaig. She died in Sheffield

Sheffield

Sheffield is a city and metropolitan borough of South Yorkshire, England. Its name derives from the River Sheaf, which runs through the city. Historically a part of the West Riding of Yorkshire, and with some of its southern suburbs annexed from Derbyshire, the city has grown from its largely...

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