Person: Hamel, Georg Karl Wilhelm
Georg Hamel was a German mathematician who worked in mechanics, the foundations of mathematics and function theory.
Mathematical Profile (Excerpt):
 At this time Klein was running a seminar which studied the theory of elasticity, descriptive geometry, and mechanics, and Hamel participated in this seminar.
 Hamel was appointed Professor of Mechanics at the German Technical University of Brünn on 3 October 1905.
 Klein spoke highly of Hamel in his reference but considered Carathéodory superior for the particular position, and Carathéodory was appointed.
 Hamel was appointed to the chair of mechanics at the RheinischWestfälische Hochschule in Aachen on 1 October 1912, then in 1919 he moved to the Technical University of Charlottenburg in Berlin where he was appointed as professor of mathematics and mechanics.
 Hamel was clearly associated with the views of National Socialism and in 1933 spoke of a spiritual bond between mathematics and the "Third Reich".
 Blaschke resigned the Chairmanship of the German Mathematical Society in January 1935 and Hamel was appointed chairman to replace him.
 Although Hamel met with approval by the National Socialists, his leadership was based on mathematical scholarship despite his close links with Nazi policies.
 Together with Süss and Behnke, Hamel also served on an Instruction Commission set up by the German Mathematical Society.
 Hamel worked in function theory, mechanics and the foundations of mathematics.
 He is perhaps best known for the Hamel basis, published in 1905, when he made an early and explicit use of the Axiom of Choice to construct a basis for the real numbers as a vector space over the rational numbers.
 In 1927 Hamel computed the size of the key space of the KryhaCipheringMachine, which was quoted extensively by "Internationale KryhaMaschinenGesellschaft" (Hamburg) to infer the unbreakability of the Kryha machines.
Born 12 September 1877, Düren, Rhineland, Germany. Died 4 October 1954, Landshut, Germany.
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Origin Germany
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive