 Clifford Hugh Dowker

Clifford Hugh Dowker (1912–1982) was a topologist known for his work in pointset topology and also for his contributions in category theory, sheaf theory and knot theory.
Contents
Biography
Clifford Hugh Dowker was brought up on a small farm in Western Ontario, Canada. He excelled in mathematics and was paid to teach his math teacher math at his secondary school. He was awarded a scholarship at Western Ontario University, where he got his B.S. in 1933. He wanted to pursue a career as a teacher, but he was persuaded to continue with his education because of his extraordinary mathematical talent. He earned his Ph.D. from Princeton University in 1938. After earning his doctorate, he became an instructor at the Western Ontario University for a year. The next year, he worked as an assistant back at Princeton under John von Neumann. During World War II, he worked for the U.S. Air Force, calculating the trajectories of projectiles. He married Yael Naim in 1944. After the war, he was appointed associate professor at the Tufts University. Because of Senator Joseph McCarthy's red scare, he decided to take his family to England shortly thereafter, where he was appointed Reader in applied mathematics at Birkbeck University in 1951. In 1962 he was granted a personal chair, until he retired in 1979. The last years of his life were marked by a long illness, yet he continued working, developing Dowker notation in the weeks before his death. Although a mathematical genius, he remained modest, with a gentle humor, to the end of his days.^{[1]}^{[2]}
Work
Dowker showed that Čech and Vietoris homology groups coincide, as do the Čech cohomology and Alexander cohomology groups.^{[3]}
Dowker, along with Morwen Thistlethwaite, developed Dowker notation, a simple way of describing knots, suitable for computers.^{[4]}
Dowker conjectured that Dowker spaces could not exist, a conjecture ultimately proven false.^{[5]}References
 ^ Dowker biography
 ^ Times obituary
 ^ http://www.cmi.ac.in/~strivedi/MScThesis.pdf
 ^ Weisstein, Eric W. "Dowker Notation." From MathWorldA Wolfram Web Resource. http://mathworld.wolfram.com/DowkerNotation.html
 ^ http://arxiv.org/pdf/math/9512202v1
See also
 Dowker notation
 Dowker space
 Čech cohomology
 Morwen Thistlethwaite
 Sheaf theory
Categories: Topologists
 1982 deaths
 1912 births
 University of Western Ontario alumni
Wikimedia Foundation. 2010.
Look at other dictionaries:
Clifford Hugh Dowker — (* 2. März 1912 in Parkhill (Ontario, Kanada); † 14. Oktober 1982 in London, England) war ein kanadischer Mathematiker. Clifford Hugh Dowker studierte zunächst an der University of Toronto Physik und Wirtschaftswissenschaften mit dem Lehrerberuf… … Deutsch Wikipedia
Dowker notation — A knot diagram with crossings labelled for a Dowker sequence In the mathematical field of knot theory, the Dowker notation, also called the Dowker–Thistlethwaite notation or code, for a knot is a sequence of even integers. The notation is named… … Wikipedia
Morwen Thistlethwaite — Nationality British Fields … Wikipedia
Problème des ménages — Ne doit pas être confondu avec Lemme des mariages. Une table à dix couverts. D après la solution au problème des ménages, il y a 3120 manières différentes, pour 5 couples, de s asseoir en alternant hommes et femmes et sans qu aucu … Wikipédia en Français
List of people by Erdős number — Paul Erdős was one of the most prolific writers of mathematical papers. He collaborated a great deal, having 511 joint authors, a number of whom also have many collaborators. The Erdős number measures the collaborative distance between an author… … Wikipedia
John von Neumann — Von Neumann redirects here. For other uses, see Von Neumann (disambiguation). The native form of this personal name is Neumann János. This article uses the Western name order. John von Neumann … Wikipedia
List of mathematicians (D) — NOTOC Dab * Daboll, Nathan (USA, 1750 1818) * de Dacia, Petrus (Denmark, ? ) * Daemen, Joan (?, 1965 ) * Dafermos, Constantine (Greece, ? ) * Dahlquist, Germund (Sweden, 1925 2005) * Damgov, Vladimir (Bulgaria, 1947 2006) * Damm, Arvid Gerhard (? … Wikipedia