Nikolai Luzin
Nikolai Nikolayevich Luzin was a Soviet and Russian mathematician known for his work in descriptive set theory and aspects of mathematical analysis with strong connections to point-set topology. He was the eponym of Luzitania, a loose group of young Moscow mathematicians of the first half of the 1920s. They adopted his set-theoretic orientation, and went on to apply it in other areas of mathematics.
9 December 1883
Born on the same birth date (9 December 1883): Alexandros Papagos • Joseph Pilates
Born on the same birth day (9 December): Adriaan Metius • Brent Price • Clarence Birdseye • Fred Jones (rugby league) • Gustavus Adolphus • Irene Greenwood • Lori Greiner • Margaret Brundage • Milt Campbell • Paul Landers • Tom Daschle
Born in the same month (December 1883): Anton Webern • Belle da Costa Greene • Giovanni Messe • Henry Cadbury • Hugo Bergmann • Katharine Susannah Prichard • Károly Kós • Lester Patrick • Marcus Hurley • Maurice Utrillo • Max Linder • Morihei Ueshiba • Stefan Jaracz