John Edensor Littlewood

From Wikipedia, the free encyclopedia
  (Redirected from John E. Littlewood)
Jump to: navigation, search
John Edensor Littlewood
Born (1885-06-09)9 June 1885
Rochester, Kent, England
Died 6 September 1977(1977-09-06) (aged 92)
Cambridge, England
Residence United Kingdom
Nationality British
Fields Mathematician
Institutions Trinity College, Cambridge
Alma mater Trinity College, Cambridge
Doctoral advisor Ernest William Barnes
Doctoral students A. O. L. Atkin
Sarvadaman Chowla
Harold Davenport
Srinivasa Ramanujan
Stanley Skewes
Donald C. Spencer
Albert Ingham
Known for Mathematical analysis
Notable awards Smith's Prize (1908)
Royal Medal (1929)
De Morgan Medal (1938)
Sylvester Medal (1943)
Copley Medal (1958)
Senior Berwick Prize (1960)

John Edensor Littlewood (9 June 1885 – 6 September 1977)[1] was a British mathematician, best known for his achievements in analysis, number theory, and differential equations.

Biography[edit]

Littlewood was born on 1885 in Rochester, Kent, the eldest son of Edward Thornton Littlewood and Sylvia Maud. In 1892, his father accepted the headmastership of a school in Wynberg, Cape Town in South Africa, taking his family there.[2] Littlewood returned to England in 1900 to attend St Paul's School in London, studying under Francis Sowerby Macaulay, an influential algebraic geometer.[3]

In 1903, Littlewood entered the University of Cambridge, studying in Trinity College. He spent his first two years preparing for the Tripos examinations which qualify undergraduates for a bachelor's degree. In 1906, after completing the last part of the Tripos, he started his research under Ernest Barnes.[4] One of the problems that Barnes suggested to Littlewood was to prove the Riemann hypothesis, an effort which proved unfruitful.[5] He was elected a Fellow of Trinity College in 1908 and, apart from three years as Richardson Lecturer in the University of Manchester, the balance of his career was spent at the University of Cambridge. He was appointed Rouse Ball Professor of Mathematics in 1928, retiring in 1950. He was elected a Fellow of the Royal Society in 1916, awarded the Royal Medal in 1929, the Sylvester Medal in 1943 and the Copley Medal in 1958. He was president of the London Mathematical Society from 1941 to 1943, and was awarded the De Morgan Medal in 1938 and the Senior Berwick Prize in 1960.

Work[edit]

Most of Littlewood's work was in the field of mathematical analysis. He began research under the supervision of Ernest William Barnes, who suggested that he attempt to prove the Riemann hypothesis: Littlewood showed that if the Riemann hypothesis is true then the Prime Number Theorem follows and obtained the error term. This work won him his Trinity fellowship. However, the link between the Riemann hypothesis and the Prime Number Theorem had been known before in Continental Europe, and Littlewood wrote later in his book, A Mathematician's Miscellany that his rediscovery of the result did not shed a positive light on the isolated nature of British mathematics at the time.[citation needed]

He coined Littlewood's law, which states that individuals can expect "miracles" to happen to them, at the rate of about one per month.

He continued to write papers into his eighties, particularly in analytical areas of what would become the theory of dynamical systems.

Littlewood is also remembered for his book of reminiscences, A Mathematician's Miscellany (new edition published in 1986).

Among his own PhD students were Sarvadaman Chowla, Harold Davenport, Donald C. Spencer and Srinivasa Ramanujan. Spencer reported that in 1941 when he (Spencer) was about to get on the boat that would take him home to the United States, Littlewood reminded him: "n, n alpha, n beta!" (referring to Littlewood's conjecture).

Littlewood's collaborative work, carried out by correspondence, covered fields in Diophantine approximation and Waring's problem, in particular. In his other work, he collaborated with Raymond Paley on Littlewood–Paley theory in Fourier theory, and with Cyril Offord in combinatorial work on random sums, in developments that opened up fields that are still intensively studied.

He worked with Mary Cartwright on problems in differential equations arising out of early research on radar: their work foreshadowed the modern theory of dynamical systems. Littlewood's 4/3 inequality on bilinear forms was a forerunner of the later Grothendieck tensor norm theory.

With Hardy[edit]

Littlewood collaborated for many years with G. H. Hardy. Together they devised the first Hardy–Littlewood conjecture, a strong form of the twin prime conjecture, and the second Hardy–Littlewood conjecture.

In a 1947 lecture, the Danish mathematician Harald Bohr said, "To illustrate to what extent Hardy and Littlewood in the course of the years came to be considered as the leaders of recent English mathematical research, I may report what an excellent colleague once jokingly said: 'Nowadays, there are only three really great English mathematicians: Hardy, Littlewood, and Hardy–Littlewood.'" [6] :xxvii

There is a story (related in the Miscellany) that at a conference Littlewood met a German mathematician who said he was most interested to discover that Littlewood really existed, as he had always assumed that Littlewood was a name used by Hardy for lesser work which he did not want to put out under his own name; Littlewood apparently roared with laughter.[citation needed] There are versions of this story involving both Norbert Wiener and Edmund Landau, who, it is claimed, "so doubted the existence of Littlewood that he made a special trip to Great Britain to see the man with his own eyes".[7]

Cultural references[edit]

John Littlewood is depicted in the film The Man Who Knew Infinity.

See also[edit]

References[edit]

  1. ^ Burkill 1978, p. 322.
  2. ^ Burkill 1978, p. 324: "He later accepted the headmastership of a newly founded school at Wynberg near Cape Town, taking his family there in 1892."
  3. ^ Bateman & Diamond 1978, p. 28: "In 1900 he returned to England, where he attended St. Paul's School and studied with the talented teacher and mathematician F. S. Macaulay."
  4. ^ Bateman & Diamond 1978, pp. 28-29: "He began his research later that year on asymptotic formulas for integral functions of order zero, under his tutor and director of studies E. W. Barnes."
  5. ^ Bateman & Diamond 1978, p. 29: "Barnes proposed to Littlewood the task of proving the Riemann hypothesis ... he did not succeed in that strenuous assignment ..."
  6. ^ Bohr, Harald (1952). "Looking Backward". Collected Mathematical Works. 1. Copenhagen: Dansk Matematisk Forening. xiii–xxxiv. OCLC 3172542. 
  7. ^ Steven G. Krantz (2001). Mathematical Anecdotes. Mathematical Intelligencer. Springer. ISBN 978-0-387-98686-9. 
  8. ^ Phillips, Keith L. (1967). "The Maximal Theorems of Hardy and Littlewood". Amer. Math. Monthly. 74 (6): 648–660. doi:10.2307/2314249. JSTOR 2314249. 

Bibliography[edit]

Further reading[edit]

External links[edit]