(1956) in mathematics from the famous Rajabazar Science College, University of Calcutta and Ph.D. in combinatorics (1959) from University of North Carolina at Chapel Hill. He served as consultant at Cornell Medicine and Sloan Kettering, a professor and chairman of the Department of Mathematics at Ohio State University, as well as a visiting professor of University of Göttingen and University of Erlangen in Germany, University of London, and Tata Institute of Fundamental Research in Mumbai.