On some characterizations of the complex number field
W. Więsław (1972)
Colloquium Mathematicae
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W. Więsław (1972)
Colloquium Mathematicae
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Carlos Currás Bosch (1979)
Collectanea Mathematica
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Radosław Drabiński (2011)
Colloquium Mathematicae
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This short note considers the question of whether every atomless σ-field contains an uncountable partition. The paper comments the situation for a couple of known σ-fields. A negative answer to the question is the main result.
Djordje Musicki (1962)
Publications de l'Institut Mathématique [Elektronische Ressource]
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Edward Grzegorek (2007)
Acta Universitatis Carolinae. Mathematica et Physica
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Harvey Cohn, George Cooke (1976)
Acta Arithmetica
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Nizkii, R.Ya. (2005)
Journal of Mathematical Sciences (New York)
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Francesco Nicolò (1986)
Recherche Coopérative sur Programme n°25
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Giorgio Velo (1977)
Recherche Coopérative sur Programme n°25
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Jack Ohm (1989)
Journal de théorie des nombres de Bordeaux
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Some results and problems that arise in connection with the foundations of the theory of ruled and rational field extensions are discussed.
Ikeda, Satoshi (1999)
Balkan Journal of Geometry and its Applications (BJGA)
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Lou van den Dries, Jana Maříková (2010)
Fundamenta Mathematicae
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In answering questions of J. Maříková [Fund. Math. 209 (2010)] we prove a triangulation result that is of independent interest. In more detail, let R be an o-minimal field with a proper convex subring V, and let st: V → k be the corresponding standard part map. Under a mild assumption on (R,V) we show that a definable set X ⊆ Vⁿ admits a triangulation that induces a triangulation of its standard part st X ⊆ kⁿ.