On the Brauer groups of fibrations

Abstract Let {X} C X → C be a flat k -morphism between smooth integral varieties over a finitely generated field k such that the generic fiber X is smooth, projective and geometrically connected. Assuming that C is a curve with function field K, we build a relation between the Tate-Shafarevich group of Pic⁰ₗ/₊ Pic X / K 0 and the geometric Brauer groups of {X} X and X, generalizing a theorem of Artin and Grothendieck for fibered surfaces to higher relative dimensions.