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{{Person|name=John Horton Conway|born=December 26, 1937|res=United States|nat=British|inst=Princeton University|alma=University of Cambridge}}
{{Person
'''John Horton Conway''' (born December 26, 1937, Liverpool, England) is a prolific mathematician active in the theory of finite groups, knot theory, number theory, combinatorial game theory and coding theory. He has also contributed to many branches of recreational mathematics, notably the invention of [[Conway's Game of Life|the Game of Life]].
|name = John Conway
|image = true
|born = December 26, 1937
|res   = United States
|nat   = British
|inst = Princeton University
|alma = University of Cambridge
}}
'''John Horton Conway''' (born December 26, 1937, Liverpool, England) is a prolific mathematician active in the theory of finite groups, knot theory, number theory, combinatorial game theory and coding theory. He has also contributed to many branches of recreational mathematics, notably the invention of [[Conway's Game of Life|the Game of Life]], and was the leader of the [[JHC group]].


Conway is currently professor of mathematics at Princeton University.  He studied at Cambridge, where he started research under Harold Davenport.  He has an Erdős number of one. He received the Berwick Prize (1971)<ref name="LMS Prizewinners">[http://www.lms.ac.uk/activities/prizes_com/pastwinners.html#berwick LMS Prizewinners]</ref>, was elected a Fellow of the Royal Society (1981)<ref>[http://www.royalsoc.ac.uk/page.asp?id=1727 List of Royal Society Fellows]</ref>, and was the first recipient of the Pólya Prize (LMS) (1987).<ref name="LMS Prizewinners"/>
Conway is currently professor of mathematics at Princeton University.  He studied at Cambridge, where he started research under Harold Davenport.  He has an Erdős number of one. He received the Berwick Prize (1971), was elected a Fellow of the Royal Society (1981), and was the first recipient of the Pólya Prize (LMS) (1987).


==Biography==
==Biography==
Line 11: Line 19:
Conway resides in Princeton, New Jersey, United States with his wife and youngest son.  He has six other children from his two previous marriages, three grandchildren, and two great-grandchildren.
Conway resides in Princeton, New Jersey, United States with his wife and youngest son.  He has six other children from his two previous marriages, three grandchildren, and two great-grandchildren.


==Game theory==
==Contributions to Life==
 
Conway is the inventor of [[Conway's Game of Life]], one of the earliest-studied and most well-known examples of a [[cellular automaton]]. He discovered many of its most fundamental and important patterns, including [[blinker]], [[block]], [[lightweight spaceship]], [[pulsar]], and [[R-pentomino]]. He was the first person to enumerate all [[still life]]s with 7 or fewer [[cell]]s.
Among amateur mathematicians, he is perhaps most widely known for his contributions to combinatorial game theory, a theory of partisan games. This he developed with Elwyn Berlekamp and [[:Category:Patterns found by Richard K. Guy|Richard K. Guy]].
 
He is also one of the inventors of the game "sprouts", as well as "philosopher's football". He developed detailed analyses of many other games and puzzles, such as the Soma cube, peg solitaire, and Conway's soldiers.  He came up with the Angel problem, which was solved in 2006.
 
He invented a new system of numbers, the surreal numbers, which are closely related to certain games and have been the subject of a mathematical novel by Donald Knuth. He also invented a nomenclature for exceedingly large numbers, the Conway chained arrow notation.
 
He is also known for the invention of [[Conway's Game of Life]], one of the early and still celebrated examples of a [[cellular automaton]].
 
==Geometry==
 
In the mid-1960s with Michael Guy, son of [[:Category:Patterns found by Richard K. Guy|Richard K. Guy]], he established that there are sixty-four convex uniform polychora excluding two infinite sets of prismatic forms.  Conway has also suggested a system of notation dedicated to describing polyhedra called Conway polyhedron notation.
 
==Geometric topology==
Conway's approach to computing the Alexander polynomial of knot theory involved skein relations, by a variant now called the Alexander-Conway polynomial. After lying dormant for more than a decade, this concept became central to work in the 1980s on the novel knot polynomials. Conway further developed tangle theory and invented a system of notation for tabulating knots, while completing the knot tables up to 10 crossings.
 
==Group theory==
He worked on the classification of finite simple groups and discovered the Conway groups. He was the primary author of the ''Atlas of Finite Groups'' giving properties of many finite simple groups. He with collaborators constructed the first concrete representations of some of the sporadic groups.
 
With [[:Category:Patterns found by Simon Norton|Simon Norton]] he formulated the complex of conjectures relating the monster group with modular functions, which was christened monstrous moonshine by them.
 
==Number theory==
He proved the conjecture by Edward Waring that every integer could be written as the sum of 37 numbers, each raised to the fifth power.
 
==Algorithmics==
For calculating the day of the week, he invented the Doomsday algorithm. The algorithm is simple enough for anyone with basic arithmetic ability to do the calculations mentally. Conway can usually give the correct answer in under two seconds. To improve his speed, he practices his calendrical calculations on his computer, which is programmed to quiz him with random dates every time he logs on. One of his early books was on finite state machines.
 
==Theoretical physics==
In 2004, Conway and Simon Kochen, another Princeton mathematician, proved the Free will theorem, a startling version of the "No Hidden Variables" principle of Quantum Mechanics. It states that given certain conditions, if an experimenter can freely decide what quantities to measure in a particular experiment, then elementary particles must be free to choose their spins in order to make the measurements consistent with physical law. In Conway's provocative wording: "if experimenters have free will, then so do elementary particles".


==Books==
==Books==
He has (co-)written several books, including ''[[Winning Ways for Your Mathematical Plays]]'' with [[Richard K. Guy]] and [[Elwyn Berlekamp]]. Conway's biography, ''[[Genius at Play]]'' (written by Siobhan Roberts), was published in 2015.


He has (co-)written several books including the ''Atlas of Finite Groups'', ''Regular Algebra and Finite Machines'', ''Sphere Packings, Lattices and Groups'', ''The Sensual (Quadratic) Form'', ''On Numbers and Games'', ''Winning Ways for your Mathematical Plays'', ''The Book of Numbers'', and ''On Quaternions and Octonions''.
{{PatternsFoundBy|name=John Conway}}
 
==See also==
* [[Conway's Game of Life]]
* [[:Category:Patterns found by John Conway|List of patterns found by John Conway]]


==References==
==References==
<references />
*{{cite web|url=http://codercontest.com/mniemiec/lifecred.htm#conway|publisher=Mark D. Niemiec |title=Life Credits |accessdate=May 5, 2009}}
*[http://www.royalsoc.ac.uk/page.asp?id=1727 List of Royal Society Fellows]
*[http://www.lms.ac.uk/activities/prizes_com/pastwinners.html#berwick LMS Prizewinners]


==External links==
==External links==
* Charles Seife, [http://www.users.cloud9.net/~cgseife/conway.html "Impressions of Conway"], The Sciences
* Charles Seife, [http://www.users.cloud9.net/~cgseife/conway.html "Impressions of Conway"], The Sciences
* Mark Alpert, "Not Just Fun and Games", ''Scientific American'' April 1999. ([http://www.sciam.com/article.cfm?articleID=0000FFD8-61FF-1C70-84A9809EC588EF21&amp;catID=2 official online version]; [http://www.cpdee.ufmg.br/~seixas/PaginaATR/Download/DownloadFiles/NotJustFunAndGames.PDF registration-free online version])
* Mark Alpert, "Not Just Fun and Games", ''Scientific American'' April 1999. ([http://www.sciam.com/article.cfm?articleID=0000FFD8-61FF-1C70-84A9809EC588EF21&amp;catID=2 official online version]; [http://www.cpdee.ufmg.br/~seixas/PaginaATR/Download/DownloadFiles/NotJustFunAndGames.PDF registration-free online version])
* Jasvir Nagra, "Conway's Proof Of The Free Will Theorem" [http://www.cs.auckland.ac.nz/~jas/one/freewill-theorem.html]
{{LinkWikipedia|John_Horton_Conway|name=John Horton Conway}}
* [http://www.math.dartmouth.edu/~doyle/docs/conway/conway Video] of Conway leading a tour of brickwork patterns in Princeton, lecturing on the ordinals, and lecturing on sums of powers and Bernoulli numbers.
 
* [http://www.adeptis.ru/vinci/m_part3_3.html Photos of John Horton Conway]
{{DEFAULTSORT:Conway, John}}
* [http://en.wikipedia.org/wiki/John_Horton_Conway John Conway] at Wikipedia

Revision as of 13:30, 21 April 2018

John Conway
John Conway
Born December 26, 1937
Residence United States
Nationality British
Institutions Princeton University
Alma mater University of Cambridge

John Horton Conway (born December 26, 1937, Liverpool, England) is a prolific mathematician active in the theory of finite groups, knot theory, number theory, combinatorial game theory and coding theory. He has also contributed to many branches of recreational mathematics, notably the invention of the Game of Life, and was the leader of the JHC group.

Conway is currently professor of mathematics at Princeton University. He studied at Cambridge, where he started research under Harold Davenport. He has an Erdős number of one. He received the Berwick Prize (1971), was elected a Fellow of the Royal Society (1981), and was the first recipient of the Pólya Prize (LMS) (1987).

Biography

Conway's parents were Agnes Boyce and Cyril Horton Conway. John had two older sisters, Sylvia and Joan. Cyril Conway was a chemistry laboratory assistant. John became interested in mathematics at a very early age and his mother Agnes recalled that he could recite the powers of two when aged four years. John's young years were difficult for he grew up in Britain at a time of wartime shortages. At primary school John was outstanding and he topped almost every class. At the age of eleven his ambition was to become a mathematician.

After leaving secondary school, Conway entered Gonville and Caius College, Cambridge to study mathematics. He was awarded his BA in 1959 and began to undertake research in number theory supervised by Harold Davenport. Having solved the open problem posed by Davenport on writing numbers as the sums of fifth powers, Conway began to become interested in infinite ordinals. It appears that his interest in games began during his years studying at Cambridge, where he became an avid backgammon player spending hours playing the game in the common room. He was awarded his doctorate in 1964 and was appointed as Lecturer in Study at the University of Cambridge. He left Cambridge in 1986 to take up the appointment to the John von Neumann Chair of Mathematics at Princeton University.

Conway resides in Princeton, New Jersey, United States with his wife and youngest son. He has six other children from his two previous marriages, three grandchildren, and two great-grandchildren.

Contributions to Life

Conway is the inventor of Conway's Game of Life, one of the earliest-studied and most well-known examples of a cellular automaton. He discovered many of its most fundamental and important patterns, including blinker, block, lightweight spaceship, pulsar, and R-pentomino. He was the first person to enumerate all still lifes with 7 or fewer cells.

Books

He has (co-)written several books, including Winning Ways for Your Mathematical Plays with Richard K. Guy and Elwyn Berlekamp. Conway's biography, Genius at Play (written by Siobhan Roberts), was published in 2015.

Patterns found by John Conway

References

External links