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arxiv: 1312.7539 · v1 · pith:IKHTLRA7new · submitted 2013-12-29 · 🧮 math.NT

Descent on toric fibrations

classification 🧮 math.NT
keywords fielddescentapproximationbrauer--maninbrowningconstantcontrolsdefined
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We describe descent on families of torsors of a constant torus. A recent result of Browning and Matthiesen then implies that the Brauer--Manin obstruction controls the Hasse principle and weak approximation when the ground field is the field of rational numbers and the singular fibres are all defined over this field.

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