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# Eduard Helly

Eduard Helly (1884, Vienna – 1943, Chicago) was a mathematician and the eponym of Helly's theorem, Helly families, Helly's selection theorem, Helly metric, and the Helly–Bray theorem. In 1912, Helly published a proof of Hahn–Banach theorem, 15 years before Hahn and Banach discovered it independently. As prisoner of war in a Russian camp at Nikolsk-Ussuriysk in Siberia, Helly wrote important contributions on functional analysis[1].

Sources

1. ^ Günter M. Ziegler: Wo die Mathematik entsteht (Where mathematics originate), in: Die Zeit, weekly newspaper, Hamburg, no. 16, 15 April 2010, p. 40

External links

* O'Connor, John J.; Robertson, Edmund F., "Eduard Helly", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Helly.html .

* Eduard Helly at the Mathematics Genealogy Project

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