On the arithmetic of del Pezzo surfaces of degree 2
Andrew Kresch, Yuri Tschinkel
math.AGarXiv:math/0402373
Abstract
We study the arithmetic of certain del Pezzo surfaces of degree 2. We produce examples of Brauer-Manin obstruction to the Hasse principle, coming from 2- and 4-torsion elements in the Brauer group.
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