Graeme Segal

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Graeme Bryce Segal
Graeme Segal.jpeg
Graeme Segal in Berkeley, 1982
Born (1941-12-21) 21 December 1941 (age 79)
Nationality Australian
Alma mater University of Sydney
St Catherine's College, Oxford
Known for Atiyah–Segal completion theorem
Segal conjecture
Spouse(s) Marina Warner
Awards Pólya Prize (1990)
Sylvester Medal (2010)
Scientific career
Fields Mathematics
Institutions St John’s College, Cambridge [1]
All Souls College, Oxford
Thesis Equivariant K-theory (1967)
Doctoral advisor Michael Atiyah

Graeme Bryce Segal FRS [2] (born 21 December 1941) is an Australian mathematician, and professor at the University of Oxford.



Segal was educated at the University of Sydney, where he received his BSc degree in 1961. He went on to receive his D.Phil. in 1967 from St Catherine's College, Oxford; his thesis, written under the supervision of Michael Atiyah, was titled Equivariant K-theory.

His thesis was in the area of equivariant K-theory. The Atiyah–Segal completion theorem in that subject was a major motivation for the Segal conjecture, which he formulated. He has made many other contributions to homotopy theory in the past four decades, including an approach to infinite loop spaces. He was also a pioneer of elliptic cohomology, which is related to his interest in topological quantum field theory.

Segal was an Invited Speaker at the ICM in 1970 in Nice [3] and in 1990 in Kyoto. [4] He was elected a Fellow of the Royal Society in 1982 and an Emeritus Fellow of All Souls College, Oxford. [5] He was awarded the Sylvester Medal by the Royal Society in 2010. [6]

He was Lowndean Professor of Astronomy and Geometry from 1990 to 1999.

Segal was elected the President of the London Mathematical Society in 2011.

He is married to writer, Marina Warner. They live in London. [7]


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  1. Dr Graeme Segal - All Souls College Oxford
  2. "Fellows of the Royal Society". Royal Society. Retrieved 14 December 2011. Dr Graeme Segal, elected fellow 1982
  3. Segal, G. "Equivariant stable homotopy theory." In Actes du Congrès International des Mathématiciens (Nice, 1970), vol. 2, pp. 59–63. 1970.
  4. Segal, Graeme. "Geometric aspects of quantum field theory." In Proc. Intern. Congress Kyoto 1990, Math. Soc, pp. 1387–1396. 1990.
  5. "Graeme Segal wins Sylvester Medal". All Souls College, Oxford. 9 June 2010. Archived from the original on 4 October 2010. Retrieved 12 October 2010.
  6. "The Sylvester Medal". The Royal Society. Retrieved 12 October 2010.
  7. Higgins, Charlotte (6 March 2021). "Interview - Marina Warner". The Guardian. Retrieved 7 March 2021.,