Rational points on del Pezzo surfaces of degree four

26 Feb 2020  ·  Vladimir Mitankin, Cecília Salgado ·

We study the distribution of the Brauer group and the frequency of the Brauer--Manin obstruction to the Hasse principle and weak approximation in a family of smooth del Pezzo surfaces of degree four over the rationals...

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Number Theory Algebraic Geometry 14G12 (primary), 11G35, 11D09, 14D10, 14G05 (secondary)