Anil Kumar Bhattacharya, Indian statistician (01 April 1915 – 17 July 1996) Proposed a measure of similarity between two multinomial distributions (Bhattacharya coefficient) Defined a cosine metric for distance between distributions or measured the divergence between two probability distributions (Bhattacharya distance) On a measure of divergence between two statistical populations defined by their probability distributions. Bull. Cal. Math. Soc. 35:99-109, 1943
Established lower bounds to the variance of an unbiased estimator Introduced the concept of affinity between two laws of probability
Bhattacharya affinity Bhattacharya bounds (1946) Bhattacharya centroid Bhattacharya clustering Bhattacharya matrix Cramer-Rao-Bhattacharya inequalities |

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