20 lectures delivered at the International Congress of Mathematicians in Vancouver, 1974 - Anosov, Dmitrii Viktorovich, 1936-2014; Barzdinʹ,IAn Martynovich,‏ 1937; Dynkin, Evgenii Borisovich, 1924-; Filippov, Vladimir Vladimirovich; Gnedenko, Boris Vladimirovich, 1912-1995; Karacuba, Anatoliĭ, Alekseevich, 1937-2008; Korneĭčuk, Nikolaj P.‏; Leont'ev, A. F.; Margulis, Gregori Aleksandrovitsch, 1946-; Mazurov, V. D.; Nehorošev, N. N.; Platonov, Vladimir Petrovich, 1939-; et al. (Translations. Series 2 ;, 1977)