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    • Austrian mathematician and philosopher

      • Hans Hahn (German: [haːn]; 27 September 1879 – 24 July 1934) 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.
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  2. Hans Hahn (German:; 27 September 1879 – 24 July 1934) was an Austrian mathematician and philosopher who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory.

  3. Hans Hahn was an Austrian mathematician who is best remembered for the Hahn-Banach theorem. He also made important contributions to the calculus of variations, developing ideas of Weierstrass.

  4. 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.

  5. In logical positivism. In 1922 Hans Hahn, one of the leaders of the Vienna Circle, laid before his students at the University of Vienna the Logisch-philosophische Abhandlung (1921; Tractatus Logico-Philosophicus, 1922) of Ludwig Wittgenstein.

  6. Introduction. The role Hans Hahn played in the Vienna Circle has not always been sufficiently appreciated. It was important in several ways. In the first place, Hahn belonged to the trio of the original planners of the Circle.

  7. The Collected Works of Hans Hahn will be published by Springer-Verlag, Vienna (edited by L. Schmetterer and K. Sigmund). The first volume (with an introductory essay by Sir Karl Popper) will appear in autumn 1995. For biographical material on Hahn, we refer to.

  8. “I am not much given to emotions”, wrote the 30-years old mathematician Hans Hahn in 1909 to the physicist Paul Ehrenfest, who lived in St. Petersburg, “but to a friend who is as far away as you are, I confess it: sometimes, when I have attempted to...

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