Raghu Raj Bahadur (30 April 1924 – 7 June 1997) was an Indian

statistician A statistician is a person who works with theoretical or applied statistics. The profession exists in both the private and public sectors. It is common to combine statistical knowledge with expertise in other subjects, and statisticians may wor ...

considered by peers to be "one of the architects of the modern theory of mathematical statistics".

Biography

Bahadur was born in

Delhi Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, primarily its western or right bank, Delhi shares borders w ...

, India, and received his BA (1943) and MA (1945) in mathematics from St. Stephen’s College,

University of Delhi Delhi University (DU), formally the University of Delhi, is a collegiate central university located in New Delhi, India. It was founded in 1922 by an Act of the Central Legislative Assembly and is recognized as an Institute of Eminence (IoE) ...

. He received his doctorate from the

University of North Carolina The University of North Carolina is the multi-campus public university system for the state of North Carolina. Overseeing the state's 16 public universities and the NC School of Science and Mathematics, it is commonly referred to as the UNC Sy ...

under

Herbert Robbins Herbert Ellis Robbins (January 12, 1915 – February 12, 2001) was an American mathematician and statistician. He did research in topology, measure theory, statistics, and a variety of other fields. He was the co-author, with Richard Courant ...

in 1950 after which he joined

University of Chicago The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park neighborhood. The University of Chicago is consistently ranked among the b ...

. He worked as a research statistician at the

Indian Statistical Institute Indian Statistical Institute (ISI) is a higher education and research institute which is recognized as an Institute of National Importance by the 1959 act of the Indian parliament. It grew out of the Statistical Laboratory set up by Prasanta C ...

in Calcutta from 1956 to 1961. He spent the remainder of his academic career in the

Contributions

He published numerous papers and is best known for the concepts of " Bahadur efficiency" and the Bahadur–Ghosh–Kiefer representation (with J. K. Ghosh and Jack Kiefer). He also framed the Anderson–Bahadur algorithmClassification into two

multivariate normal distribution In probability theory and statistics, the multivariate normal distribution, multivariate Gaussian distribution, or joint normal distribution is a generalization of the one-dimensional (univariate) normal distribution to higher dimensions. One d ...

s with different

covariance matrices In probability theory and statistics, a covariance matrix (also known as auto-covariance matrix, dispersion matrix, variance matrix, or variance–covariance matrix) is a square matrix giving the covariance between each pair of elements of ...

(1962), T W Anderson, R R Bahadur, ''Annals of Mathematical Statistics'' along with

Theodore Wilbur Anderson Theodore Wilbur Anderson (June 5, 1918 – September 17, 2016) was an American mathematician and statistician who specialized in the analysis of multivariate data. He was born in Minneapolis, Minnesota. He was on the faculty of Columbia Univ ...

which is used in statistics and engineering for solving binary classification problems when the underlying data have

s with different covariance matrices.

Legacy

He held the John Simon Guggenheim Fellowship (1968–69) and was the 1974 Wald Lecturer of the IMS. He was the President of the

Institute of Mathematical Statistics The Institute of Mathematical Statistics is an international professional and scholarly society devoted to the development, dissemination, and application of statistics and probability. The Institute currently has about 4,000 members in all parts o ...

during 1974–75 and was elected a Fellow of the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and ...

in 1986.

References

External links

* {{DEFAULTSORT:Bahadur, Raghu Raj 1924 births 1997 deaths Indian statisticians 20th-century Indian mathematicians American statisticians 20th-century American mathematicians Fellows of the American Academy of Arts and Sciences Presidents of the Institute of Mathematical Statistics University of Chicago faculty American academics of Indian descent Scientists from Delhi Indian emigrants to the United States American people of Indian descent Mathematical statisticians