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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Fernando Fernández Rodríguez, Agustín Llerena Achutegui (1991)
Extracta Mathematicae
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We say that a field K has the Extension Property if every automorphism of K(X) extends to an automorphism of K. J.M. Gamboa and T. Recio [2] have introduced this concept, naive in appearance, because of its crucial role in the study of homogeneity conditions in spaces of orderings of functions fields. Gamboa [1] has studied several classes of fields with this property: Algebraic extensions of the field Q of rational numbers; euclidean, algebraically closed and pythagorean fields; fields...
Djordje Musicki (1962)
Publications de l'Institut Mathématique [Elektronische Ressource]
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Eiji Yoshida (2003)
Acta Arithmetica
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R. Drabiński, E. Grzegorek (2009)
Colloquium Mathematicae
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We discuss the problem when ℵ₁ sets are contained in a σ-generated σ-field on some set X. This is related to a problem raised by K. P. S. Bhaskara Rao and Rae Michael Shortt [Dissertationes Math. 372 (1998)] which we answer. We also briefly discuss generating the family of all subsets from rectangles.
Harvey Cohn, George Cooke (1976)
Acta Arithmetica
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G. De Marco, M. Richter (1971)
Rendiconti del Seminario Matematico della Università di Padova
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Allison M. Pacelli, Michael Rosen (2009)
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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