Ernst Specker
Swiss mathematician (1920-2011) · Switzerland · On the map · Academics · Died at 91
Ernst Paul Specker (11 February 1920, Zürich - 10 December 2011, Zürich) was a Swiss mathematician.
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A typical day, 30 days to 24 September 2026
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Much of his most influential work was on Willard Van Orman Quine's New Foundations, a set theory with a universal set, but he is most famous for the Kochen-Specker theorem in quantum mechanics, showing that certain types of hidden-variable theories are impossible. He also proved the ordinal partition relation ω2 → (ω2, 3)2, thereby solving a problem of Paul Erdős.
