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Variétés abéliennes sur les corps de fonctions de courbes sur des corps locaux supérieurs

Published 25 Sep 2015 in math.AG and math.NT | (1509.07817v1)

Abstract: Let $k$ be a higher-dimensional local field and $X$ be a smooth projective geometrically integral curve over $k$. Let $K$ be the function field of $X$. We define Tate-Shafarevich groups of an abelian variety via cohomology classes locally trivial at each completion of $K$ coming from a closed point of $X$. We prove local duality theorems for abelian varieties over $k$, as well as global duality theorems for Tate-Shafarevich groups of abelian varieties over $K$. Soient $k$ un corps local sup\'erieur et $X$ une courbe projective lisse g\'eom\'etriquement int`egre de corps de fonctions $K$. On d\'efinit les groupes de Tate-Shafarevich d'une vari\'et\'e ab\'elienne en consid\'erant les classes de cohomologie qui deviennent triviales sur chaque compl\'et\'e de $K$ provenant d'un point ferm\'e de $X$. On \'etablit des th\'eor`emes de dualit\'e locale pour les vari\'et\'es ab\'eliennes sur $k$, ainsi que des th\'eor`emes de dualit\'e globale pour les groupes de Tate-Shafarevich des vari\'et\'es ab\'eliennes sur $K$.

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