K. R. Parthasarathy (probabilist)

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K. R. Parthasarathy
K. R. Parthasarathy.jpg
K. R. Parthasarathy
Born (1936-06-25) 25 June 1936 (age 81)[1]
Madras, India
Nationality Indian
Fields Mathematics
Institutions Indian Statistical Institute
Alma mater Ramakrishna Mission Vivekananda College,
Doctoral advisor C. R. Rao
Known for Quantum stochastic calculus
Notable awards Shanti Swarup Bhatnagar Award
TWAS Prize

Kalyanapuram Rangachari Parthasarathy (born 25 June 1936) is professor emeritus at the Indian Statistical Institute and a pioneer of quantum stochastic calculus.


He was born in 1936 [2][3] at Chennai. He studied at the Ramakrishna Mission Vivekananda College, where he completed the B.A. (Honours) course in Mathematics, and moved to the Indian Statistical Institute, Kolkata, where he completed his Ph.D., under the supervision of C. R. Rao in 1962. He was one of the "famous four"[4] (the others were R. Ranga Rao, Veeravalli S. Varadarajan, and S. R. Srinivasa Varadhan ) in ISI during 1956-1963. He was awarded the first Ph.D. degree of ISI.[2] He received the Shanti Swarup Bhatnagar Prize for Science and Technology in Mathematical Science in 1977 and the TWAS Prize in 1996.[5]


He worked at the Steklov Mathematical Institute, USSR Academy of Sciences (1962–63), as Lecturer where he collaborated with Andrey Kolmogorov.[6] Later he came in United Kingdom as Professor of Statistics in University of Sheffield (1964–68), University of Manchester (1968-70) and later at University of Nottingham where he collaborated with Robin Lyth Hudson on their pioneering work in quantum stochastic calculus.[3][7][8][9] Then he returned to India, and after a few years in Bombay University and the Indian Institute of Technology, Delhi, he came back in 1976 to the new Indian Statistical Institute, Delhi Centre and he stayed there till he retired in 1996.[2]

He is the namesake of Kostant–Parthasarathy–Ranga Rao–Varadarajan determinants along with Bertram Kostant, R. Ranga Rao and Veeravalli S. Varadarajan which they introduced in 1967.[10]

Books authored[edit]

Among the books he has authored are:


  1. ^ Kalyanapuram Rangachari PARTHASARATY at mathunion.org
  2. ^ a b c Kalyan Bidhan Sinha and B. V. Rajarama Bhat. "Professor K. R. Parthasarathy" (PDF). Louisiana State University. 
  3. ^ a b "Conferring on him the degree of Doctor of Sciences". Chennai Mathematical Institute. 
  4. ^ Kalyan Bidhan Sinha and B. V. Rajarama Bhat. "Veeravalli S. Varadarajan" (PDF). Louisiana State University. 
  5. ^ "Prizes and Awards". The World Academy of Sciences. 2016. 
  6. ^ "Professor KR Parthasarathy". Indian National Science Academy. 
  7. ^ D Applebaum. "Robin Hudson's Pathless Path to Quantum Stochastic Calculus" (PDF). 
  8. ^ Jinqiao Duan; Shunlong Luo; Caishi Wang (2010). Recent development in stochastic dynamics and stochastic analysis. World Scientific. p. preface-x. ISBN 9814277266. 
  9. ^ K. R. Parthasarathy. "Quantum Stochastic Calculus". 
  10. ^ K. R. Parthasarathy, R. Ranga Rao, and Veeravalli S. Varadarajan. "Representations of complex semi-simple Lie groups and Lie algebras." The Annals of Mathematics 85.3 (1967): 383-429

External links[edit]