Gabriel Andrew Dirac Explained

Gabriel Andrew Dirac
Birth Date:1925 3, df=yes
Birth Place:Budapest
Death Place:Arlesheim
Fields:Mathematics
Workplaces:University of Aarhus, Trinity College Dublin
Education:Ph.D.
Alma Mater:St John's College, Cambridge
University of London
Thesis Title:On the Colouring of Graphs: Combinatorial topology of Linear Complexes
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Thesis Year:1952
Doctoral Advisor:Richard Rado
Known For:Graph theory
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Gabriel Andrew Dirac (13 March 1925 – 20 July 1984) was a Hungarian-British mathematician who mainly worked in graph theory.[1] He served as Erasmus Smith's Professor of Mathematics at Trinity College Dublin from 1964 to 1966.[2] In 1952, he gave a sufficient condition for a graph to contain a Hamiltonian circuit. The previous year, he conjectured that n points in the plane, not all collinear, must span at least

\lfloorn/2\rfloor

two-point lines, where

\lfloorx\rfloor

is the largest integer not exceeding

x

. This conjecture was proven true when n is sufficiently large by Green and Tao in 2012.[3]

Education

Dirac started his studies at St John's College, Cambridge in 1942, but in that same year, the war saw him serving in the aircraft industry.[1] He received his MA in 1949, and moved to the University of London, getting his Ph.D. "On the Colouring of Graphs: Combinatorial topology of Linear Complexes" there under Richard Rado.

Career

Dirac's main academic positions were at the King's College London (1948-1954), University of Toronto (1952-1953), University of Vienna (1954-1958), University of Hamburg (1958-1963), Trinity College Dublin (Erasmus Smith's Professor of Mathematics, 1964-1966), University of Wales at Swansea (1967-1970), and Aarhus University (1970-1984).[1]

Family

He was born Balázs Gábor in Budapest, to Richárd Balázs, a military officer and businessman, and Margit "Manci" Wigner (sister of Eugene Wigner).[4] When his mother married Paul Dirac in 1937, he and his sister resettled in England and were formally adopted, changing their family name to Dirac. He married Rosemari Dirac and they had four children together: Meike, Barbara, Holger and Annette.[5]

See also

References

Notes and References

  1. Thomassen . Carsten . 1985 . Gabriel Andrew Dirac Obituary . Journal of Graph Theory . 9 . 303–318 . 10.1002/jgt.3190090302 . 28656582 . 2021-05-01.
  2. Book: Webb, D.A. . Barlett . J.R.. 1992 . Trinity College Dublin Record Volume 1991 . Dublin . Trinity College Dublin Press . 1-871408-07-5.
  3. Green. Ben. Tao. Terence. 2012-08-23. On sets defining few ordinary lines. 1208.4714. math.CO.
  4. Web site: Magyar Tudomány. 100 ÉVE SZÜLETETT WIGNER JENÕ 400 ÉVE SZÜLETETT OTTO von GUERICKE . DocPlayer . hu . 29 January 2022.
  5. Book: Gabriel Andrew Dirac. . Annals of Discrete Mathematics . 1988 . 41 . 1–6 . Elsevier . 10.1016/S0167-5060(08)70444-8 . 9780444871299 . en . 16 December 2022.