Michael Lvovitch Tsetlin

Michael Lvovitch Tsetlin (the surname is also written Cetlin, Tzetlin, Zeitlin, Zetlin; cyrillic: Михаил Львович Цетлин) (22 September 1924 – 30 May 1966) was a Russian mathematician and physicist who worked on cybernetics. He introduced the Gelfand–Tsetlin basis for finite-dimensional representations of classical groups.