• Thumbnail for Ernst Specker
    Specker received his Ph.D. in 1949 from ETH Zurich, where he remained throughout his professional career. Specker sequence Baer–Specker group Ernst Specker...
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  • Kochen–Specker (KS) theorem, also known as the Bell–KS theorem, is a "no-go" theorem proved by John S. Bell in 1966 and by Simon B. Kochen and Ernst Specker...
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  • Thumbnail for Specker sequence
    first example of such a sequence was constructed by Ernst Specker (1949). The existence of Specker sequences has consequences for computable analysis....
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  • Specker is a surname. Notable people with the surname include: Ernst Specker (1920–2011), Swiss mathematician Joe C. Specker (1921–1944), United States...
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  • the field of group theory, the Baer–Specker group, or Specker group, named after Reinhold Baer and Ernst Specker, is an example of an infinite Abelian...
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  • Thumbnail for Determinism
    arguments include quantum contextuality, by Bell, Simon B. Kochen and Ernst Specker, which argues that hidden variable theories cannot be "sensible", meaning...
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  • Thumbnail for Computable number
    sequence with this property is known as a Specker sequence, as the first construction is due to Ernst Specker in 1949. Despite the existence of counterexamples...
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  • result equivalent to the Kochen–Specker theorem (hence the latter is sometimes also known as the Bell–Kochen–Specker or Bell–KS theorem). However, publication...
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  • application of model theory to algebra. In 1967 Kochen and Ernst Specker proved the Kochen–Specker theorem in quantum mechanics and quantum contextuality...
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  • Thumbnail for Heinrich Kleisli
    at ETH Zurich in 1960, having been supervised by Beno Eckmann and Ernst Specker. His dissertation was on homotopy and abelian categories. He served...
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  • Mermin, and a closely related model was presented by Simon B. Kochen and Ernst Specker. The existence of these models is related to the fact that Gleason's...
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  • Thumbnail for Johann Makowsky
    He studied at ETH Zurich from 1967–73. He was a student in Zürich of Ernst Specker and Hans Läuchli in mathematical logic, (Diploma in Mathematics and...
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  • Thumbnail for List of people by Erdős number
    Singhi Alexander Soifer Vera Sós Ernst Specker Joel Spencer Cameron Leigh Stewart Doug Stinson Arthur Harold Stone Ernst G. Straus Mathukumalli V. Subbarao...
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  • Kochen–Specker theorem Mermin–Peres square KCBS pentagram Quantum nonlocality Quantum foundations Quantum indeterminacy S. Kochen and E.P. Specker, "The...
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  • announcement of the result in an earlier paper of his from 1941, and by Ernst Specker who gave a different proof in his Habilitationsschrift of 1951, proof...
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  • motivated later work by John Bell, Ernst Specker and Simon Kochen that led to the result often called the Kochen–Specker theorem, which likewise shows that...
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  • Thumbnail for Heinz Hopf
    the Silesian Friedrich Wilhelm University where he attended lectures by Ernst Steinitz, Adolf Kneser, Max Dehn, Erhard Schmidt, and Rudolf Sturm. When...
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  • mathematician Jakob Steiner (1796–1863), mathematician and physicist Ernst Specker (1920–2011), mathematician Eduard Stiefel (1909–1978), mathematician...
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  • was shown in 1937 by Reinhold Baer to not be free abelian, although Ernst Specker proved in 1950 that all of its countable subgroups are free abelian...
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  • Thumbnail for Beno Eckmann
    Heinz Hopf Doctoral students Alfred Aeppli Erwin Bolthausen Alfred Frölicher Hans Grauert Peter J. Huber Michel Kervaire Ernst Specker Urs Stammbach...
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  • Thumbnail for Euphorbia maritae
    name from the discoverer, Marita Specks, who collected the first known specimen in Tanzania with her husband Ernst Specks in 1999. Werner Rauh (1999). "Euphorbia...
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  • Stephen Schlossberg, 90, American union leader. Ernst Specker, 91, Swiss mathematician (Kochen–Specker theorem). Frank Stephens, 98, Australian surgeon...
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  • Comprehension is equivalent to a finite conjunction of its instances, In 1953, Ernst Specker showed that the axiom of choice is false in NF (without urelements)...
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  • Carswell Smart (Assessor 1979–1983) Vladimir Smirnov (Assessor 1979–1983) Ernst Specker (Assessor 1966–1969) Frits Staal (Treasurer 1969–1975) Friedrich Stadler...
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  • Lawvere Founds synthetic differential geometry 1967 Simon Kochen–Ernst Specker Kochen–Specker theorem in quantum mechanics 1967 Jean-Louis Verdier Defines...
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  • (1965–1979; President 1970–1976), Wolfgang Stegmüller (1965–1969), Ernst Specker (1970–1977), Heinz-Dieter Ebbinghaus (1972–1981), Anne Troelstra (1977–2000)...
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  • The Ernst Jung Prize is a prize awarded annually for excellence in biomedical sciences. The Ernst Jung Foundation, funded by Hamburg merchant Ernst Jung...
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  • (Basel) 1968–69 Walter Nef (Bern) 1970–71 Roger Bader (Neuchâtel) 1972–73 Ernst Specker (ETH Zurich) 1974–75 André Haefliger (Geneva) 1976–77 Heinrich Kleisli...
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  • his PhD in Mathematics from ETH Zurich in 1978 under supervision of Ernst P. Specker and has been a faculty member at Pennsylvania State University since...
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  • 1–56, doi:10.2307/1970696, ISSN 0003-486X, JSTOR 1970696, MR 0265151 Specker, Ernst (1957), "Zur Axiomatik der Mengenlehre (Fundierungs- und Auswahlaxiom)"...
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