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Hans Hahn (September 27, 1879 – July 24, 1934) was an Austrian mathematician who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order t ...
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Ernst Waldfried Josef Wenzel Mach (/ˈmɑːx/; German: [ˈɛɐnst max]; February 18, 1838 – February 19, 1916) was an Austrian physicist and philosopher, noted for his contributions to physics such as the M ...
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