Raj Chandra Bose
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Raj Chandra Bose  

Raj Chandra Bose


Born  Calcutta, India 
19 June 1901
Died  31 October 1987 Fort Collins, Colorado 
(aged 86)
Residence  India, USA 
Citizenship  United States 
Fields  Mathematics and Statistics 
Institutions  Colorado State University University of North Carolina at Chapel Hill 
Alma mater  University of Calcutta 
Known for  Association scheme Bose–Mesner algebra Euler's conjecture on Latin squares 
Raj Chandra Bose (19 June 1901 – 31 October 1987) was an Indian American mathematician and statistician best known for his work in design theory and the theory of errorcorrecting codes in which the class of BCH codes is partly named after him. He was notable for his work along with S. S. Shrikhande and E. T. Parker in their disproof of the famous conjecture made by Leonhard Euler dated 1782 that there do not exist two mutually orthogonal Latin squares of order 4n + 2 for every n.
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Early life
Bose was born in Hoshangabad, India; he was the first of five children. His father was a physician and life was good until 1918 when his mother died in the influenza pandemic. His father died of a stroke the following year. In very difficult circumstances Bose continued to study coming in first in the M.A. examinations in pure mathematics at the University of Calcutta. He did research under the supervision of the geometer Professor Syamadas Mukhopadhyaya from Calcutta. Bose found a job as a lecturer at Asutosh College, Calcutta. He managed to publish some work on the differential geometry of convex curves.
Academic life
Bose's course changed in December 1932 when P. C. Mahalanobis, director of the new (1931) Indian Statistical Institute, offered Bose a parttime job. Mahalanobis had seen Bose’s geometrical work and wanted him to work in statistics. The day after Bose moved in, the secretary brought him all the volumes of Biometrika with a list of 50 papers to read and also Fisher's Statistical Methods for Research Workers. Mahalanobis told him, "You were saying that you do not know much statistics. You master the 50 papers … and Fisher's book. This will suffice for your statistical education for the present." With Samarendra Nath Roy, who joined the ISI a little later, Bose was the chief mathematician at the Institute.
He first worked in multivariate analysis where he collaborated with Mahalanobis and Roy. In 1938–9 Fisher visited India and talked about the design of experiments. Roy had the idea of using the theory of finite fields and finite geometry to solve problems in design. The development of a mathematical theory of design would be Bose's main preoccupation until the mid1950s.
In 1935 Bose had become fulltime at the Institute. In 1940 joined the University of Calcutta where C. R. Rao and H. K. Nandi were in the first group of students he taught. In 1945 Bose became Head of the Department of Statistics. The university authorities told him he had to have a doctorate. So he submitted his published papers on multivariate analysis and the design of experiments and was awarded a D. Litt. in 1947.
In 1947 Bose went to the United States as a visiting professor at Columbia University and the University of North Carolina at Chapel Hill. He received offers from American universities and he was also offered positions in India. The Indian jobs involved very heavy administration, which he saw as the end of his research work and in March 1949 he joined the University of North Carolina at Chapel Hill as Professor of Statistics.
In the years at Chapel Hill Bose made important discoveries on coding theory (with D.K. RayChaudhuri) and constructed (with S. S. Shrikhande and E. T. Parker ) a GraecoLatin square of size 10, a counterexample to Euler's conjecture that no GraecoLatin square of size 4k + 2 exists. In 1971 he retired aged 70. He then accepted a chair at Colorado State University of Fort Collins from which he retired in 1980. His final doctoral student finished after this second retirement.
Bose died in Colorado, aged 86, in 1987. He is survived by two daughters. The elder, Purabi Schur, is retired from the Library of Congress and the younger, Sipra Bose Johnson, is retired as a professor of anthropology from the State University of New York at New Paltz.
Some articles by R. C. Bose
 R. C. Bose, On the construction of balanced incomplete block designs, Annals of Eugenics. 9 (1939), 358–399.
 R. C. Bose and K. R. Nair, Partially balanced incomplete block designs, Sankhya 4 (1939), 337–372.
 Bose, R. C.; Mesner, D. M. (1959). "On linear associative algebras corresponding to association schemes of partially balanced designs". Annals of Mathematical Statistics 30 (1): 21–38. doi:10.1214/aoms/1177706356. JSTOR 2237117. MR 102157.
 R. C. Bose and S. S. Shrikhande, On the falsity of Euler’s conjecture about the nonexistence of two orthogonal Latin squares of order 4t + 2, Proceedings of the national Academy of Science USA, 45, (1959), 734–737.
 R. C. Bose and D.K. RayChaudhuri On a class of errorcorrecting binary codes, Information and control, 3, (1960), 68–79.
Autobiography
 J. Gani (ed) (1982) The Making of Statisticians, New York: SpringerVerlag.
This has a chapter in which Bose tells the story of his life.
Discussions
 Norman R. Draper (1990) Obituary: Raj Chandra Bose, Journal of the Royal Statistical Society Series A, Vol. 153, No. 1. pp. 98–99.
 “Bose, Raj Chandra”, pp. 183–184 in Leading Personalities in Statistical Sciences from the Seventeenth Century to the Present, (ed. N. L. Johnson and S. Kotz) 1997. New York: Wiley. Originally p
See also
External links
 R. C. Bose:another photograph on the Portraits of Statisticians page.
 Indian Statistical Institute: useful background information
 Raj Chandra Bose at the Mathematics Genealogy Project
 Peter Cameron's Quotes on Mathematics: where the story about fields comes from
 Weisstein, Eric W., "Euler's GraecoRoman Squares Conjecture", MathWorld. For Euler's conjecture
 Mathematical Concept in Bengal

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