S. N. Roy
| S.N. Roy | |
|---|---|
Samarendra Nath Roy
|
|
| Native name | সমরেন্দ্রনাথ রায় |
| Born |
11 December 1906 Calcutta, India |
| Died | 23 July 1964 (aged 57) Jasper, Alberta, Canada |
| Residence | India, US |
| Citizenship | United States |
| Fields | Mathematician and Statistician |
| Institutions |
Calcutta University Indian Statistical Institute University of North Carolina, Chapel Hill |
| Alma mater | Calcutta University |
| Doctoral advisor |
P. C. Mahalanobis N. R. Sen |
| Doctoral students | Ingram Olkin |
| Known for | Multivariate analysis |
Samarendra Nath Roy or S. N. Roy (11 December 1906 – 23 July 1964) was an Indian-born American mathematician and an applied statistician.
Roy was the first of three 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 The Tribune, then publishing from Lahore. During the massacre of the Indians at the hands of the British in the infamous incident at Jallianwala Bagh in April 1919, The Tribune published a news report titled "Prayer at the Jama Masjid", on 6 April 1919. For this "offence" Kali Nath Roy was sentenced to rigorous imprisonment for two years along with a fine of one thousand rupees.
Roy secured first division in the Matriculation Examination in 1923 from the Khulna District School. He was the topper in the Intermediate Science (Higher Secondary) Examinations in 1925 from the Daulatpur Hindu Academy. He obtained first class and was the topper in both the BSc Mathematics (Honours) from Presidency College of the University of Calcutta in 1928 and the MSc in Applied Mathematics (with the Theory of Relativity as the elective) from the University of Calcutta in 1931.
In 1931, when Roy joined the Department of Applied Mathematics at the University of Calcutta as a research associate, he used computing facilities at the newly established Indian Statistical Institute, which was founded by Professor P. C. Mahalanobis. Roy along with several talented young scholars including J. M. Sengupta, H. C. Sinha, Raj Chandra Bose, K. R. Nair, K. Kishen and C. R. Rao, joined to form an active group of statisticians under Mahalanobis. Roy was one of the very early students of 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.
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