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Pure motives with representable Chow groups

Let $k$ be an algebraically closed field. We show using Kahn's and Sujatha's theory of birational motives that a Chow motive over $k$ whose Chow groups are all representable belongs to the full and thick subcategory of motives generated by the twisted motives of curves. -- Motifs purs dont les groupes de Chow sont représentables. Soit $k$ un corps algébriquement clos. Nous prouvons, en nous servant de la théorie des motifs birationnels développée par Kahn et Sujatha, qu'un motif de Chow défini sur $k$ dont les groupes de Chow sont tous représentables appartient à la sous-catégorie pleine et épaisse des motifs engendrée par les motifs de courbes tordus.

preprint2011arXivOpen access
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