Number Theory and Algebraic Geometry: Valeurs d'un polynôme à une variable représentées par une norme
Number Theory and Algebraic Geometry: Valeurs d'un polynôme à une variable représentées par une norme
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DOI:
10.1017/cbo9780511734946.006
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
Jean-Louis Colliot-Thélène;D. Harari;A. Skorobogatov
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文献类型:
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作者:
Jean-Louis Colliot-Thélène;D. Harari;A. Skorobogatov
The aim of the paper is twofold. On the one hand, we study the Brauer group of a smooth and proper model of the k-variety given by P (t) = NormK/k(z), where P (t) is a polynomial, and NormK/k(z) is the norm form defined by a finite field extension K/k, with k essentially an arbitrary field. Under some additional hypotheses we compute this group explicitly. On the other hand, when k is the field of rational numbers, and P (t) is a product of arbitrary powers of two linear factors, we prove that the Brauer-Manin obstruction to the Hasse principle and weak approximation is the only one.