Tirukkannapuram Vijayaraghavan
Tirukkannapuram Vijayaraghavan 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 the University of Dhaka in protest at Weil's firing from AMU.
Vijayaraghavan proved a special case of Herschfeld's theorem on nested radicals: For
converges if and only if
where denotes the limit superior.
