Hans Hahn (mathematician)
Hans Hahn was an Austrian mathematician and philosopher who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory. In philosophy he was among the main logical positivists of the Vienna Circle.
27 September 1879
Born on the same birth date (27 September 1879): Cyril Scott • Frederick Schule
Born on the same birth day (27 September): Abraham Gotthelf Kästner • Barbara Dickson • Brendon McCullum • Claude Jarman Jr. • Gaston Tarry • George Müller • Grazia Deledda • Jon McLaughlin (musician) • Konstantin Gerchik • Larry Wall • Markus Rosenberg • Red Rodney • Rodney Cotterill • Steve Simpson (rugby league)
Born in the same month (September 1879): Cyril Scott • Frederick Schule • Joseph Lyons • Joseph Wirth • Lope K. Santos • Louis Coatalen • Margaret Sanger • Max Schreck • Periyar • Rube Foster