Person: Preston, Gordon Bamford
Gordon Preston was an English mathematician who worked at Bletchley Park in World War II. He was an important worker in semigroup theory.
Mathematical Profile (Excerpt):
 In common with other bright mathematics undergraduates, Preston went to Bletchley Park, Buckinghamshire, a government research centre north of London.
 Preston now continued to undertake research at Oxford on a parttime basis, first with Whitehead then with E C (Edward) Thomson as his advisor.
 Preston was released from his teaching duties at the Royal Military College of Science so that he could spend two years in the United States.
 The first volume of Clifford and Preston's The algebraic theory of semigroups was published in 1961.
 Gordon lived in Oxford  Shrivenham, his place of work, is just 30 km away  and he was a regular attender at the Higman algebra seminar.
 We mentioned above that the first volume of Clifford and Preston, The algebraic theory of semigroups, was published in 1961.
Born 28 April 1925, Workington, England. Died 14 April 2015, Oxford, England.
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Origin England
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References
Adapted from other CC BYSA 4.0 Sources:
 Oâ€™Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive