If is a number field, arithmetic duality theorems for tori and complexes of tori over are crucial to understand local-global principles for linear algebraic groups over . When is a global field of positive characteristic, we prove similar arithmetic duality theorems, including a Poitou-Tate exact sequence for Galois hypercohomology of complexes of tori. One of the main ingredients is the Artin-Mazur-Milne duality theorem for fppf cohomology of finite flat commutative group schemes.
Sur un corps de nombres , les théorèmes de dualité pour les tores et les complexes de tores sont cruciaux afin de comprendre le principe local-global pour les -groupes algébriques linéaires. Nous démontrons de tels théorèmes de dualité arithmétique quand est un corps global de caractéristique , et en particulier nous établissons une suite de Poitou-Tate pour l’hypercohomologie galoisienne d’un complexe de tores. Un des principaux ingrédients est la dualité d’Artin-Mazur-Milne pour la cohomologie fppf d’un schéma en groupes fini et plat.
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Keywords: Artin-Mazur-Milne duality, complex of tori, flat cohomology, Poitou-Tate exact sequence
Mot clés : Dualité d’Artin-Mazur-Milne, complexe de tores, cohomologie plate, suite exacte de Poitou-Tate
@article{JEP_2020__7__831_0, author = {Demarche, Cyril and Harari, David}, title = {Duality for complexes of tori over a~global~field of positive characteristic}, journal = {Journal de l{\textquoteright}\'Ecole polytechnique {\textemdash} Math\'ematiques}, pages = {831--870}, publisher = {Ecole polytechnique}, volume = {7}, year = {2020}, doi = {10.5802/jep.129}, language = {en}, url = {http://archive.numdam.org/articles/10.5802/jep.129/} }
TY - JOUR AU - Demarche, Cyril AU - Harari, David TI - Duality for complexes of tori over a global field of positive characteristic JO - Journal de l’École polytechnique — Mathématiques PY - 2020 SP - 831 EP - 870 VL - 7 PB - Ecole polytechnique UR - http://archive.numdam.org/articles/10.5802/jep.129/ DO - 10.5802/jep.129 LA - en ID - JEP_2020__7__831_0 ER -
%0 Journal Article %A Demarche, Cyril %A Harari, David %T Duality for complexes of tori over a global field of positive characteristic %J Journal de l’École polytechnique — Mathématiques %D 2020 %P 831-870 %V 7 %I Ecole polytechnique %U http://archive.numdam.org/articles/10.5802/jep.129/ %R 10.5802/jep.129 %G en %F JEP_2020__7__831_0
Demarche, Cyril; Harari, David. Duality for complexes of tori over a global field of positive characteristic. Journal de l’École polytechnique — Mathématiques, Volume 7 (2020), pp. 831-870. doi : 10.5802/jep.129. http://archive.numdam.org/articles/10.5802/jep.129/
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