Shaun Wylie

Shaun Wylie (17 January 1913 – 2 October 2009Obituary — Shaun Wylie: member of Bletchley Park code-breaking team
''The Times'', 5 November 2009.Dr Shaun Wylie, 1913–2009
Trinity Hall, Cambridge, UK.) was a British mathematician and World War II codebreaker.

Early life

Wylie was born in Oxford, England. The fourth son of Sir Francis Wylie (later the first Warden of Rhodes House, Oxford) and his wife Kathleen (formerly Kelly), he was educated at the Dragon School (in Oxford) and then Winchester College.An interview with Shaun Wylie
on 21 June 1985, The Princeton Mathematics Community in the 1930s, Transcript Number 45 (PMC 5). He won a scholarship to New College, Oxford where he studied mathematics and classics. In 1934, he went to study topology at Princeton University, obtaining a PhD in 1937 with Solomon Lefschetz as his supervisor. At Princeton he met fellow English mathematician Alan Turing. He became a fellow of Trinity Hall, Cambridge in 1938/1939.Trinity Hall Newsletter
Spring 2005.

World War II codebreaking

During World War II, Turing had been recruited to work at Bletchley Park, Britain's codebreaking centre. Turing wrote to Wylie around December 1940, who was by then teaching at Wellington College, inviting him to work at Bletchley Park.Andrew Hodges, '' Alan Turing: The Enigma'', Simon & Schuster, 1983, p. 198 He accepted, and arrived in February 1941. He joined Turing's section, Hut 8, which was working on solving the Enigma machine as used by the ''Kriegsmarine''. He became head of the crib subsection, and allocated time on the bombe codebreaking machines.
Hugh Alexander, successor to Turing as head of Hut 8, commented that "except for Turing, no-one made a bigger contribution to the success of Hut 8 than Shaun Wylie; he was astonishingly quick and resourceful and contributed to theory and practice in a number of different directions".

Wylie transferred in Autumn 1943 to work on " Tunny", a German teleprinter cipher. He married Odette Murray, a WREN in the section. In 1945, soon after the victory in Europe, Wylie demonstrated how Colossus – electronic machines used to help solve Tunny – could have been used unmodified to break the Tunny "motor wheels", a task which had been previously done by hand. While at Bletchley Park, he became president of the dramatic club.Kahn, 1991, pp. 137-138 He had also played international hockey for Scotland, but according to fellow codebreaker I. J. Good, he "never mentioned any of his successes".Good, 2006, p. 209

Post-war

After the war, he was a fellow at Trinity Hall until 1958 and lectured in mathematics."Notes on contributors", p. 532 in Michael Smith and Ralph Erskine, editors, ''Action This Day'', 2001 He was the PhD advisor for Frank Adams, Max Kelly, Crispin Nash-Williams, William Tutte and Christopher Zeeman. With Peter Hilton, he authored ''Homology Theory: An Introduction to Algebraic Topology'', published in 1960.

In 1958, he became Chief Mathematician at GCHQ, the UK signals intelligence organisation. In July 1969, he was sent a draft paper by James H. Ellis, another GCHQ mathematician, about the possibility of what was termed "non-secret encryption", or what is now more commonly known as public-key cryptography, on which Wylie commented "unfortunately, I can't see anything wrong with this".Steven Levy, ''Crypto'', 2001, p. 318 He retired in 1973, and taught at Cambridgeshire High School for Boys (later Hills Road Sixth Form College) in Cambridge for seven years. He was elected an honorary fellow at Trinity Hall in 1980.

Wylie supervised five PhD students at Cambridge, through whom he had over 1600 "descendants" in 2021 according to the American Mathematical Society Mathematical Genealogy Project. In addition he influenced the intellectual development of generations of pupils at the Cambridgeshire High School for Boys/ Hills Road Sixth Form College where he taught maths (particularly statistics, with his beloved chi-squared distribution) and classical Greek and where he also produced plays (such as Chekhov's ''The Cherry Orchard'') and supervised the school chess team. He also came out of retirement temporarily to teach Mathematics at Long Road Sixth Form College.

After retirement from teaching, Wylie was instrumental in the founding of the Liberal Democrats and in the Cambridge-based University of the Third Age and at the time of his death was preparing to read in the next Cambridge Greek Play, Aeschylus' ''Agamemnon''.

His eldest son, the late Keith Wylie (1945–1999), a barrister, was a croquet international and open champion of Great Britain., ''The Times'', 1999.

Shaun Wylie died on 2 October 2009, aged 96.

Notes

References

* Ralph Erskine, "Breaking Air Force and Army Enigma", pp. 47–76 in Michael Smith and Ralph Erskine eds., ''Action This Day'', 2001.
* David Kahn, ''Seizing the Enigma'', 1991.
* Brian Randall, "Of Men and Machines", pp. 141–149 in B. Jack Copeland editor, ''Colossus: The Secrets of Bletchley Park's Codebreaking Computers'', Oxford University Press, 2006.
* Shaun Wylie, "Breaking Tunny and the Birth of Colossus", pp. 317–348 in Michael Smith and Ralph Erskine, editors, ''Action This Day'', 2001.
* Jack Good, "From Hut 8 to the Newmanry", pp. 204–222 in B. Jack Copeland editor, ''Colossus: The Secrets of Bletchley Park's Codebreaking Computers'', Oxford University Press, 2006.
* Updated and extended version of ''Action This Day: From Breaking of the Enigma Code to the Birth of the Modern Computer'' Bantam Press 2001
*

External links

*

Photograph of Christopher Zeeman and Shaun Wylie
taken 25 February 2000.


''The Daily Telegraph'', 21 October 2009.

{{DEFAULTSORT:Wylie, Shaun
1913 births
2009 deaths
People from Oxford
People educated at The Dragon School
People educated at Winchester College
Alumni of New College, Oxford
Princeton University alumni
Bletchley Park people
GCHQ cryptographers
Fellows of Trinity Hall, Cambridge
British topologists
English mathematicians