On the arithmetic of del Pezzo surfaces of degree 2
On the arithmetic of del Pezzo surfaces of degree 2
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. 2000 Mathematics Subject Classification 14G05 (primary), 12G05 (secondary).