Calyampudi Radhakrishna Rao

Calyampudi Radhakrishna Rao
  • Calyampudi Radhakrishna Rao is a prominent Indian-American mathematician and statistician born to a Telugu family in Hadagali, Karnataka.
  • He is currently a professor emeritus at Pennsylvania State University and Research Professor at the University at Buffalo.
  • He received many honours like
    • Padma Bhushan (1968) and
    • Padma Vibhushan (2001).
  • In his remarkable 1945 paper published in the Bulletin of the Calcutta Mathematical Society, Rao demonstrated three fundamental results that paved the way for the modern field of statistics and provided statistical tools heavily used in science today.
    • The first, known as the Cramer-Rao lower bound,
    • The second known as the Rao-Blackwell and
    • The third result provided insights that pioneered a new interdisciplinary field that has flourished as “information geometry.”
  • Combined, these results help scientists more efficiently extract information from data.

Applications of Calyampudi Radhakrishna Rao’s theories

  • The Cramer-Rao lower bound is of great importance in such diverse fields as signal processing, spectroscopy, radar systems, multiple image radiography, risk analysis, and quantum physics.
  • The Rao-Blackwell process has been applied to stereology, particle filtering, and computational econometrics.
  • Information geometry has recently been used to aid the understanding and optimization of Higgs boson measurements at the Large Hadron Collider.
    • It has also found applications in recent research on radars and antennas and contributed significantly to advancements in artificial intelligence, data science, signal processing, shape classification and image segregation.

Latest News about International Prize in Statistics


  1. Indian Today
  2. The Hindu

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