Tirukkannapuram Vijayaraghavan

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Thirukannapuram Vijayaraghavan
Born 30 November 1902
Died April 20, 1955(1955-04-20) (aged 52)
Occupation mathematician

Tirukkannapuram Vijayaraghavan (Tamil: திருக்கண்ணபுரம் விஜயராகவன்; 30 November 1902 – 20 April 1955) was an Indian mathematician from the Madras region. He worked with G. H. Hardy when he went to Oxford in mid-1920s on Pisot–Vijayaraghavan numbers. He was a fellow of Indian Academy of Sciences elected in the year 1934.

Vijayaraghavan was well versed in Sanskrit and Tamil. He was a close friend of André Weil. He served with him in Aligarh Muslim University. He later moved to University of Dhaka, to protest at Weil's firing from AMU.[1]

Vijayaraghavan proved a special case of Herschfeld's theorem on nested radicals:[2] For

converges if and only if

where denotes the limit superior.


  1. ^ M.S. Raghunathan, Artless innocents and ivory-tower sophisticates: Some personalities on the Indian mathematical scene.
  2. ^ Ramanujan, S. Collected Papers of Srinivasa Ramanujan (Ed. G. H. Hardy, P. V. S. Aiyar, and B. M. Wilson). Providence, RI: American Mathematical Society (2000), p. 348.

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