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math.NT2023
Cubic surfaces failing the integral Hasse principle
Julian Lyczak, Vladimir Mitankin, H. Uppal
We study the integral Brauer--Manin obstruction for affine diagonal cubic surfaces, which we employ to construct the first counterexamples to the integral Hasse principle in this s…
math.NT2023★ 2 cited
Paucity of rational points on fibrations with multiple fibres
Tim Browning, Julian Lyczak, Arne Smeets
Given a family of varieties over the projective line, we study the density of fibres that are everywhere locally soluble in the case that components of higher multiplicity are allo…