In 1965, Nevanlinna was an honorary guest at a function theory congress in Soviet Armenia. IMU Abacus Medal (formerly Nevanlinna Prize) When the IMU in 1981 decided to create a prize, similar to the Fields Medal, in theoretical computer science and the funding for the prize was secured from Finland, the Union decided to give Nevanlinna's name to the prize; the Rolf Nevanlinna Prize is awarded every four years at the ICM. In 2018, the General Assembly of the IMU approved a resolution to remove Nevanlinna's name from the prize. As of 2022 it's known as the IMU Abacus Medal. See also Harmonic measure Nevanlinna theory Nevanlinna class (functions of bounded type) Nevanlinna function Nevanlinna invariant Nevanlinna–Pick interpolation Nevanlinna's criterion Nevanlinna Prize References Sources External links Nevanlinna, Rolf. National Biography of Finland. 1895 births 1980 deaths People from Joensuu People from Kuopio Province (Grand Duchy of Finland) 20th-century Finnish mathematicians Academic staff of the University of Helsinki Finnish mathematicians Finnish people of German descent Recipients of the Order of the Cross of Liberty, 2nd Class University of Helsinki alumni Members of the German Academy of Sciences at Berlin Rectors of the University of Helsinki Chancellors of the University of Turku Academic staff of ETH Zurich People of the Finnish Civil War (White side) Academic journal editors Presidents of the International Mathematical Union Members of the Royal Swedish Academy of Sciences