All Questions

Let $k$ be a field (it is possible to assume that $k = \mathbb{Q}$ or $= \overline{\mathbb{Q}}$) and $X, Y$ nice varieties over $k$. Let $f \colon Y \to X$ be a finite flat surjective morphism of ...

Let $X$ be a locally noetherian regular scheme, and let $Z$ be a closed subscheme of $X$ whose codimension $d > 0$ at every point. Let $U$ be the complement of $Z$ in $X$. For a sheaf $\mathscr{F}$ ...

Is etale-Brauer the only obstruction to the existence of rational points on projective plane curves over number fields?