L'espace ad\'elique d'un tore sur un corps de fonctions
Abstract
Let be a field of characteristic 0 and let be the function field of a smooth projective geometrically integral -curve . Let be a -torus. In this article, we aim at studying the space of adelic points of outside a finite set of closed points of . We start by proving that the group of rational points of is always discrete (hence closed) in . We then describe the quotient in each of the following three cases: is an algebraically closed field, is the field of Laurent series , and is a -adic field. Soient un corps de caract\'eristique 0 et le corps des fonctions d'une -courbe projective lisse g\'eom\'etriquement int\`egre . Soit un -tore. Dans cet article, on cherche \`a \'etudier l'espace des points ad\'eliques de hors d'un ensemble fini de points ferm\'es de . On commence par montrer que le groupe des points rationnels de est toujours ferm\'e discret dans . On d\'ecrit ensuite le quotient dans chacun des trois cas suivants: corps alg\'ebriquement clos, et corps -adique.
Cite
@article{arxiv.1801.01463,
title = {L'espace ad\'elique d'un tore sur un corps de fonctions},
author = {David Harari and Diego Izquierdo},
journal= {arXiv preprint arXiv:1801.01463},
year = {2018}
}
Comments
30 pages, in French. Theorem 4.5 has been improved. Section 4.2 has been added