|Born||Richard Ewen Borcherds
29 November 1959 
Cape Town, South Africa
|Alma mater||Trinity College, Cambridge|
|Known for||Borcherds algebra|
|Thesis||The leech lattice and other lattices (1984)|
|Doctoral advisor||John Horton Conway|
|Doctoral students||Daniel Allcock|
Richard Ewen Borcherds (//; born 29 November 1959) is a British-American mathematician currently working in quantum field theory. He is known for his work in lattices, number theory, group theory, and infinite-dimensional algebras, for which he was awarded the Fields Medal in 1998.
Borcherds was born in Cape Town, but the family moved to Birmingham in the United Kingdom when he was six months old. His father is a physicist and he has three brothers, two of whom are mathematics teachers. He was a promising mathematician and chess player as a child, winning several national mathematics championships and "was in line for becoming a chess master" before giving up chess after coming to believe that the higher levels of competitive chess are merely about the competition rather than the fun of playing.
After receiving his doctorate in 1985 he has held various alternating positions at Cambridge and the University of California, Berkeley, serving as Morrey Assistant Professor of Mathematics at Berkeley from 1987 to 1988. He was a Royal Society University Research Fellow. From 1996 he held a Royal Society Research Professorship at Cambridge before returning to Berkeley in 1999 as Professor of mathematics. At Berkeley, he held a Miller Research Professorship from 2000 to 2001.
Borcherds's early work included pioneering results on classification of unimodular lattices, and the introduction of new algebraic objects, most notably vertex algebras and Borcherds-Kac-Moody algebras. These ideas came together in his vertex-algebraic construction and analysis of the fake monster Lie algebra (called the monster Lie algebra at the time).
Borcherds is best known for his resolution of the Conway-Norton monstrous moonshine conjecture, which describes an intricate relation between the monster group and modular functions on the complex upper half-plane. To prove this conjecture, he drew upon theories that he had previously introduced, namely those of vertex algebras and Borcherds-Kac-Moody algebras, together with techniques of string theory, and applied them to the "moonshine module", a vertex operator algebra with monster symmetry constructed by Igor Frenkel, James Lepowsky, and Arne Meurman. Additional work in moonshine concerned mod p variants of this conjecture, and were known as modular moonshine.
Later contributions include the theory of Borcherds products, which are holomorphic automorphic forms on O(n,2) that have well-behaved infinite product expansions at cusps. Borcherds used this theory to resolve some long-standing conjectures concerning quasi-affineness of certain moduli spaces of algebraic surfaces. More recently, Borcherds has rendered perturbative renormalization, in particular the 't Hooft-Veltman proof of perturbative renormalizability of gauge theory, into rigorous mathematical language.
An interview with Simon Singh for The Guardian, in which Borcherds suggested he might have some traits associated with Asperger syndrome, subsequently led to a chapter about him in a book on autism by Simon Baron-Cohen. Baron-Cohen concluded that while Borcherds had many autistic traits, he did not merit a formal diagnosis of Asperger syndrome.
Awards and honours
In 1992 he was one of the first recipients of the EMS prizes awarded at the first European Congress of Mathematics in Paris, and in 1994 he was an invited speaker at the International Congress of Mathematicians in Zurich. In 1994, he was elected to the Royal Society of Fellows. In 1998 at the 23rd International Congress of Mathematicians in Berlin, Germany he received the Fields Medal together with Maxim Kontsevich, William Timothy Gowers and Curtis T. McMullen. The award cited him "for his contributions to algebra, the theory of automorphic forms, and mathematical physics, including the introduction of vertex algebras and Borcherds' Lie algebras, the proof of the Conway-Norton moonshine conjecture and the discovery of a new class of automorphic infinite products." In 2012 he became a fellow of the American Mathematical Society, and in 2014 he was elected to the National Academy of Sciences.
- "BORCHERDS, Prof. Richard Ewen". Who's Who 2014, A & C Black, an imprint of Bloomsbury Publishing plc, 2014; online edn, Oxford University Press.(subscription required)
- Goddard, Peter (1998). "The work of Richard Ewen Borcherds". Proceedings of the International Congress of Mathematicians, Vol. I (Berlin, 1998). Documenta Mathematica. pp. 99–108. arXiv: . ISSN 1431-0635..
- Richard Borcherds at the Mathematics Genealogy Project
- James Lepowsky, "The Work of Richard Borcherds", Notices of the American Mathematical Society, Volume 46, Number 1 (January 1999).
- Simon Singh, "Interview with Richard Borcherds", The Guardian (28 August 1998)
- "UC Berkeley professor wins highest honor in mathematics, the prestigious Fields Medal". University of California, Berkeley. 19 August 1998. Retrieved 22 July 2009.
- Jackson, Allyn (November 1998). "Borcherds, Gowers, Kontsevich, and McMullen Receive Fields Medals" (PDF). Notices of the American Mathematical Society. American Mathematical Society. 45 (10).
- Cook, Alan (2000). "URFs become FRS: Frances Ashcroft, Athene Donald, and John Pethica". Notes and Records of the Royal Society. London: Royal Society. 54 (3): 409–411. doi:10.1098/rsnr.2000.0181.
- Baron-Cohen, Simon (2004). "A Professor of Mathematics". The Essential Difference: Male and Female Brains and the Truth about Autism. Basic Books. ISBN 0-465-00556-X. (see external links) records conversations with Richard Borcherds and his family.
- High flying obsessives, The Guardian, December 2000
- "EC/1994/05: Borcherds, Richard Ewen". London: The Royal Society. Archived from the original on 27 May 2014.
- List of Fellows of the American Mathematical Society. Retrieved 10 November 2012.
- National Academy of Sciences Members and Foreign Associates Elected Archived 18 August 2015 at the Wayback Machine., National Academy of Sciences, 29 April 2014.
- Conway and Sloane, Sphere Packings, Lattices, and Groups, Third Edition, Springer, 1998 ISBN 0-387-98585-9.
- Frenkel, Lepowsky and Meurman, Vertex Operator Algebras and the Monster, Academic Press, 1988 ISBN 0-12-267065-5.
- Kac, Victor, Vertex Algebras for Beginners, Second Edition, AMS 1997 ISBN 0-8218-0643-2.
- O'Connor, John J.; Robertson, Edmund F., "Richard Borcherds", MacTutor History of Mathematics archive, University of St Andrews.
- Richard Borcherds's publications indexed by the Scopus bibliographic database, a service provided by Elsevier. (subscription required)