Dijen Kumar Ray-Chaudhuri

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Dijen Kumar Ray-Chaudhuri

Dijen Kumar Ray-Chaudhuri , actually Dwijendra Ray-Chaudhuri, (born November 1, 1933 in Narayanganj , British India ) is an Indian-American mathematician . He deals with combinatorics .

Life

Ray-Chaudhuri studied at the University of Calcutta (Master's degree in 1956) and at the University of North Carolina at Chapel Hill , where he received his doctorate in 1959 under Raj Chandra Bose (“On the Application of the Geometry of Quadrics to the Construction of Partially Balanced Incomplete Block Designs and Error Correcting Binary Codes ”). In 1956/7 and 1961/2 he was a researcher at the Indian Statistical Institute in Calcutta. In 1960 he became an assistant professor at the University of North Carolina. In 1960 he was with Bell Laboratories and in 1961 with Rand Corporation . From 1962 to 1965 he was with IBM at the Thomas J. Watson Research Center. In 1965/6 he was Visiting Associate Professor at the University of Wisconsin and from 1966 professor at Ohio State University , where he was chairman of the mathematics faculty from 1979 to 1982 and 1990 to 1994. He was visiting professor in Göttingen , Erlangen , London and at the Tata Institute of Fundamental Research . Ray-Chaudhuri is a US citizen.

Ray-Chaudhuri and RC Bose developed the BCH codes named after them and A. Hocquenghem . In 1968 he and his student Richard M. Wilson solved the general case of Thomas Kirkman's "schoolgirl problem" from 1850.

He was invited speaker at the International Congress of Mathematicians in Nice in 1970 (“On some recent developments in the theory of combinatorial designs”). He is an honorary member of the Hungarian Academy of Sciences and a Fellow of the American Mathematical Society and received the Euler Medal in 1999.

His doctoral students include Richard M. Wilson (1969), Jeff Kahn and Ákos Seress .

Web links

Individual evidence

  1. ^ “On a class of binary error correcting group codes”, Information and Control, Vol. 3, 1960, p. 68, and “Further Results on error correcting group codes”, p. 279.
  2. ^ "Solution of Kirkman's schoolgirl problem," Symposia in Pure Mathematics, AMS, Vol. 19, 1971, pp. 187-203
  3. ^ The ICA Medals. Institute of Combinatorics and its Applications, accessed June 17, 2018 .