Eduard Helly was a mathematician born in Vienna on June 1, 1884, after whom Helly's theorem, Helly families, Helly's selection theorem, the Helly metric and the Helly-Bray theorem were named. He earned his doctorate from the University of Vienna in 1907 and continued his studies for another year at the University of Göttingen. He was shot in 1915 while serving in the Austrian army and spent the rest of World War I as a prisoner of the Russians; in a prison camp in Berezovka, Siberia, he organized a mathematical seminar in which Tibor Radó began his interest in pure mathematics. Unable to obtain a paid university position in Vienna, he escaped to America after the Nazi takeover of Austria in 1938, moved to Chicago in 1941, and died there on 28 November 1943.
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Source Wikipedia: Eduard Helly
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Source Wikipedia: Eduard Helly
Source MacTutor History of Mathematics, University of St Andrews: Eduard Helly
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Source Helly's Selection Theorem (Wikipedia)
Source Helly's theorem and related results (Wikipedia)
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1. Wikipedia: Eduard Helly
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Helly earned his doctorate from the University of Vienna in 1907, with two advisors, Wilhelm Wirtinger and Franz Mertens.
Principal Result: Helly's Selection Theorem, Article text
Eduard Helly (June 1, 1884 in Vienna, 28 November 1943 in Chicago) was a mathematician after whom Helly's theorem, Helly families, Helly's selection theorem, Helly metric, and the Helly-Bray theorem were named.
View the Source2. MacTutor History of Mathematics, University of St Andrews: Eduard Helly
MacTutor History of Mathematics, University of St AndrewsQuick Info: Born
1 June 1884
Principal Result: Helly's Theorem, Biography text
He is remembered for Helly's theorem, published in 1923 , which states that if there are given n n n convex subsets of a d d d -dimensional Euclidean space with n ≥ d + 1 n ≥ d+1 n ≥ d + 1 and if each collection of d + 1 d + 1 d + 1 of the subsets has a point in common then there is a common point o
View the Source Helly's theorem and related results (Wikipedia)
Proofs Credited: Helly's Theorem, Lead sentence, attributionQuote, Proofs Credited: Helly's Theorem, Lead sentence, attribution
discovered by Eduard Helly in 1913
View the Source Helly's Selection Theorem (Wikipedia)
Proofs Credited: Helly's Selection Theorem, Lead sectionQuote, Proofs Credited: Helly's Selection Theorem, Lead section
It is named for the Austrian mathematician Eduard Helly.
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