S. N. Roy
Encyclopedia
Samarendra Nath Roy or S. N. Roy (Bangla: সমরেন্দ্র নাথ রায়; 11 December 1906 – 23 July 1964) was an India
n-born America
n mathematician
and an applied statistician
. He was the first of two children of Kali Nath Roy and Suniti Bala Roy. His father, Kali Nath Roy was a freedom fighter and the Chief Editor of the newspaper TRIBUNE.
Prof. Roy had a brilliant academic career. He secured first division in the Matriculation Examination in 1923. He came first in the Intermediate Science (Higher Secondary) Examinations in 1925. He also became first class first in both the B.Sc. Mathematics (Honours) from Presidency College
of the University of Calcutta
in 1928 and the M.Sc. examinations from the University of Calcutta
in 1931.
At that time Professor P. C. Mahalanobis
was the director of the new (1931) Indian Statistical Institute
. Several talented young scholars including J. M. Sengupta, H. C. Sinha, Raj Chandra Bose
, S. N. Roy, K. R. Nair, K. Kishen and C. R. Rao
, joined to form an active group of statisticians under Prof. Mahalanobis. S. N. Roy was one of the very early students of Prof. Prasanta Chandra Mahalanobis, who initiated some of the early works in Statistics. He was well known for his pioneering contribution to multivariate statistical analysis, mainly that of the Jacobians of complicated transformations for various exact distributions, rectangular coordinates and the Bartlett decomposition. His dissertation included the Post master's work at the Indian Statistical Institute where he worked under Mahalanobis.
It was Bose who first went to the United States as a visiting professor at Columbia University and the University of North Carolina, Chapel Hill in 1947. Roy later joined him at the University of North Carolina Chapel Hill and later became Professor of Statistics. S. N. Roy had 15 doctorate students there from 1950 till 1963. To commemorate his Birth Centenary an International Conference on "Multivariate Statistical Methods in the 21st Century: The Legacy of Prof. S.N. Roy" was held at Kolkata, India during December 28–29, 2006. The Journal of Statistical Planning and Inference published a special Issue for celebrating of the Centennial of Birth of S. N. Roy.
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
n-born America
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
n mathematician
Mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....
and an applied statistician
Statistician
A statistician is someone who works with theoretical or applied statistics. The profession exists in both the private and public sectors. The core of that work is to measure, interpret, and describe the world and human activity patterns within it...
. He was the first of two children of Kali Nath Roy and Suniti Bala Roy. His father, Kali Nath Roy was a freedom fighter and the Chief Editor of the newspaper TRIBUNE.
Prof. Roy had a brilliant academic career. He secured first division in the Matriculation Examination in 1923. He came first in the Intermediate Science (Higher Secondary) Examinations in 1925. He also became first class first in both the B.Sc. Mathematics (Honours) from Presidency College
Presidency College, Kolkata
Presidency University, Kolkata, formerly Hindu College and Presidency College, is a unitary, state aided university, located in Kolkata, West Bengal. and one of the premier institutes of learning of liberal arts and sciences in India. In 2002 it was ranked number one by the weekly news magazine...
of the University of Calcutta
University of Calcutta
The University of Calcutta is a public university located in the city of Kolkata , India, founded on 24 January 1857...
in 1928 and the M.Sc. examinations from the University of Calcutta
University of Calcutta
The University of Calcutta is a public university located in the city of Kolkata , India, founded on 24 January 1857...
in 1931.
At that time Professor P. C. Mahalanobis
Prasanta Chandra Mahalanobis
Prasanta Chandra Mahalanobis FRS was an Indian scientist and applied statistician. He is best remembered for the Mahalanobis distance, a statistical measure. He made pioneering studies in anthropometry in India...
was the director of the new (1931) Indian Statistical Institute
Indian Statistical Institute
Indian Statistical Institute is a public research institute and university in Kolkata's northern outskirt of Baranagar, India founded by Prasanta Chandra Mahalanobis in 1931...
. Several talented young scholars including J. M. Sengupta, H. C. Sinha, Raj Chandra Bose
Raj Chandra Bose
Raj Chandra Bose was an Indian mathematician and statistician best known for his work in design theory and the theory of error-correcting 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...
, S. N. Roy, K. R. Nair, K. Kishen and C. R. Rao
C. R. Rao
Calyampudi Radhakrishna Rao FRS known as C R Rao is an Indian statistician. He is currently professor emeritus at Penn State University and Research Professor at the University at Buffalo. Rao has been honored by numerous colloquia, honorary degrees, and festschrifts and was awarded the US...
, joined to form an active group of statisticians under Prof. Mahalanobis. S. N. Roy was one of the very early students of Prof. Prasanta Chandra Mahalanobis, who initiated some of the early works in Statistics. He was well known for his pioneering contribution to multivariate statistical analysis, mainly that of the Jacobians of complicated transformations for various exact distributions, rectangular coordinates and the Bartlett decomposition. His dissertation included the Post master's work at the Indian Statistical Institute where he worked under Mahalanobis.
It was Bose who first went to the United States as a visiting professor at Columbia University and the University of North Carolina, Chapel Hill in 1947. Roy later joined him at the University of North Carolina Chapel Hill and later became Professor of Statistics. S. N. Roy had 15 doctorate students there from 1950 till 1963. To commemorate his Birth Centenary an International Conference on "Multivariate Statistical Methods in the 21st Century: The Legacy of Prof. S.N. Roy" was held at Kolkata, India during December 28–29, 2006. The Journal of Statistical Planning and Inference published a special Issue for celebrating of the Centennial of Birth of S. N. Roy.
Some Ph.D. works under S. N. Roy
- OLKIN, INGRAMIngram OlkinIngram Olkin is a professor emeritus and chair of statistics and education at Stanford University and the Stanford University School of Education...
(1951). "On distribution problems in multivariate analysisMultivariate analysisMultivariate analysis is based on the statistical principle of multivariate statistics, which involves observation and analysis of more than one statistical variable at a time...
". - PACHARES, JAMES (1953). "On the distribution of quadratic forms".
- PILLAI, K.C. SREEDHARAN (1954). "On some distribution problems in multivariate analysisMultivariate analysisMultivariate analysis is based on the statistical principle of multivariate statistics, which involves observation and analysis of more than one statistical variable at a time...
". - MITRA, SUJIT K. (1956). "Contributions to the statistical analysis of categorical dataCategorical dataIn statistics, categorical data is that part of an observed dataset that consists of categorical variables, or for data that has been converted into that form, for example as grouped data...
". - GNANADESIKAN, RAMANATHAN (1957). "Contributions to multivariate analysisMultivariate analysisMultivariate analysis is based on the statistical principle of multivariate statistics, which involves observation and analysis of more than one statistical variable at a time...
including univariateUnivariateIn mathematics, univariate refers to an expression, equation, function or polynomial of only one variable. Objects of any of these types but involving more than one variable may be called multivariate...
and multivariate varianceVarianceIn probability theory and statistics, the variance is a measure of how far a set of numbers is spread out. It is one of several descriptors of a probability distribution, describing how far the numbers lie from the mean . In particular, the variance is one of the moments of a distribution...
components analysis and factor analysisFactor analysisFactor analysis is a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved, uncorrelated variables called factors. In other words, it is possible, for example, that variations in three or four observed variables...
". - POTTHOFF, RICHARD F. (1958). "Multi-dimensional incomplete block designs".
- DIAMOND, EARL L. (1958). "Asymptotic power and independence of certain classes of tests on categorical data".
- BARGMAN, ROLF (1958). "A study of independence and dependence in multivariate normal analysis".
- COBB, WHITFIELD (1959). "Studies in univariate and multivariate variance components analysis connected with sampling from a finite population".
- BHAPKAR, VASANT P. (1959). "Contributions to the statistical analysis of experiments with one or more responses".
- SATHE, YASHAWANDE S. (1962). "Studies in certain types of nonparametric inference".
- DAS GUPTA, SOMESH (1963). "Some problems in classification".
- MUDHOLKAR, GOVIND S. (1963). "Some contributions to the theory of univariate and multivariate statistical analysis".
Relevant Publications
- Roy, S. N. (1957), “Some Aspects of Multivariate Analysis”, New York: Wiley.
- Roy, S. N. and Sarhan, A. E. (1956), “On inverting a class of patterned matrices”, Biometrika, 43, 227-231.
- Potthoff and Roy, Biometrika, 313-316, 1964