Abstract
We compute the Shafarevich-Tate group, the kernel of the weak approximation and the Manin groups of three-dimensional algebraic tori defined over an algebraic number field. A minimal example of a torus with fractional Tamagawa number is constructed. A criterion for the validity of the Hasse norm principle for extensions of degree four of an algebraic number field is given.
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Additional information
Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 116, pp. 102–107, 1982.
The author expresses his gratitude to V. E. Voskresenskii and A. A. Klyachko for valuable discussions.
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Kunyavskii, B.É. Arithmetic properties of three-dimensional algebraic tori. J Math Sci 26, 1898–1901 (1984). https://doi.org/10.1007/BF01670577
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DOI: https://doi.org/10.1007/BF01670577