Who was born in an earlier year, Ivan Fesenko or Alexander Gelfond
Ivan Fesenko: Ivan Fesenko (Russian: Иван Борисович Фесенко ; born 1962) is a mathematician working in number theory and other areas of modern mathematics. Alexander Gelfond: Alexander Osipovich Gelfond (Russian: Алекса́ндр О́сипович Ге́льфонд ; 24 October 1906 – 7 November 1968) was a Soviet mathematician.
Alexander Osipovich Gelfond